Consider the following equilibrium:

N2(g) + 3H2(g) ⇌ 2NH3(g) + 92 kJ

The forward reaction is

Select one:

a.
exothermic and entropy is increasing.


b.
exothermic and entropy is decreasing.


c.
endothermic and entropy is constant.


d.
endothermic and entropy is increasing.


e.
endothermic and entropy is decreasing.

Answers

Answer 1

Answer:

b.exothermic and entropy is decreasing


Related Questions

2KBr + Cl₂ → 2KCI + Br₂

What type of chemical reaction is this?

Answers

Answer:

Displacement reaction

Explanation:

A displacement reaction is a reaction where a more reactive halogen will displace a less reactive one.

Reactivity decreases down group 17. So Chlorine, being the more reactive halogen, substitutes in the place of Br which is less reactive.

What volume will 3.0 moles of O2 gas occupy at S.T.P?

Answers

Answer:

3 moles of oxygen at STP will occupy a volume of 3×22. 4=67. 2 L.

Explanation:

why is accurate body measurement important in dressmaking​

Answers

Answer:

Without taking body measurements, the fabric material can run out of supply if the tailor uses it too much. And more material is required to fix small dresses or suits. So when body measurements are taken accurately, the tailor will know the exact amount of material to be used.

Explanation:

How can we know if an element is more active than the other one, so that it will displace it in displacement reaction.​

Answers

Answer:

In a reactivity series, the most reactive element is placed at the top and the least reactive element at the bottom.

A few million years ago, volcanic eruptions caused a large region to be covered by lava. The lava eventually cooled, which resulted in the formation of large amounts of igneous rock. Most of the rock formed was basalt. Today, this region is covered by soil, most of which is a soil known as laterite. Which geologic process caused the rock to change into soil?
A.
deposition
B.
erosion
C.
transportation
D.
weathering

Answers

Answer:

D

Explanation:

weathering is the breaking down of physical components through unfavorable weather conditions which can likely cause a change in physical properties

Brainliest to whoever answerers in time
Fireworks release A LOT of energy when they burn. According to the National Fire Protection Association, even a small sparkler can heat surroundings to more than 1,200ºF. What could make the combustion of gunpowder produce THAT MUCH heat?

Draw a model, create a graph, or write an explanation that includes:

How energy flows between the firework system and surroundings when bonds are broken and formed.

How the energy of breaking bonds compares relatively to the energy of bond formation in the combustion of gunpowder.

Answers

Explanation:

☹︎The base form (or root) of a verb is the form listed in the dictionary. It is the version of the verb without any endings (endings such as -s, -ing, and ed). The base form is the same as the infinitive (e.g., to walk, to paint, to think) but without the to.

H2O2_H2O+O2 balance the equation using inspection​

Answers

Answer:

2H2O2 → 2H2O + O2        

what is kept constant is constant boyles law

Answers

Answer:

temperature, or true. I don't know which you want.

Explanation:

hope this helps

product of the pressure and volume.

A molecule that is either cycloheptane or cycloheptene is treated with bromine and the sample immediately absorbs the red bromine color—which compound is present?

Answers

Since the molecule is able to immediately absorb the red color of the bromine, the molecule would be cycloheptene.

What is unsaturation?

Unsaturation in organic compounds refers to the presence of double or triple bonds in the compounds.

One way to test for unsaturation is to use bromine water. A saturated compound will not be able to absorb bromine because it is already saturated.

An unsaturated compound, on the other hand, will be able to absorb bromine due to the unsaturation. Therefore, the red color of bromine will disappear due to absorption.

Cycloheptane is saturated while cycloheptene is unsaturated. Thus, the latter will absorb the red color of bromine.

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How many joules of heat are giving off when 5.9 g of water cools from 75°C to 25 Celsius

Answers

Explanation:

The base form (or root) of a verb is the form listed in the dictionary. It is the version of the verb without any endings (endings such as -s, -ing, and ed). The base form is the same as the infinitive (e.g., to walk, to paint, to think) but without the to.

Identify the molecule with the highest boiling point. A(.C 6H 6 B(. NH 3 C(. OF 2 D(. CHCl 3

Answers

Answer:

C6H6

Explanation:

benzene (C6H6) is 80.1°C. ammonia (NH3) is -33.3°Coxygen difluoride (OF2) is -144.7°C.chloroform (CHCI 3) is 61.2°C.

Any seabin limitations

Answers

Answer:

The device can collect up to 1.5 kg (3.3 lbs) of waste per day and holds a total of 20 kg (44 lbs) of waste. To illustrate this more vividly: A Seabin can collect up to 90’000 plastic bags, 37’500 coffee cups or 16’500 PET bottles per year.

Explanation:

Not sure what you mean??

1. Which statements about activation energy are true? Select all that apply.
A)Activation energy is determined by the strength of the bonds that must be formed.
B)Activation energy is determined by the strength of the bonds that must be broken.
C)Activation energy is determined by the charge of the bonds that must be formed.
D)Activation energy is determined by the charge of the bonds that must be broken
E)Activation energy is the minimum quantity of energy that the reactants must possess
in order to undergo a specified reaction.
F)Activation energy is the maximum quantity of energy that reaction products generate
after undergoing a specified reaction.

Answers

The true statements about activation energy are as follows:

Activation energy is the minimum quantity of energy that the reactants must possess in order to undergo a specified reaction.Activation energy is determined by the strength of the bonds that must be broken.

What is activation energy?

Activation energy is the minimum amount of energy that reactants in a chemical reaction must possess so as to get converted into products.

In a chemical reaction, reactants form products, hence, certain bonds must be broken in the reactant molecules to form the products.

The energy needed to break the bonds of the reactants is known as activation energy.

Therefore, the true statements about activation energy are as follows:

Activation energy is the minimum quantity of energy that the reactants must possess in order to undergo a specified reaction.Activation energy is determined by the strength of the bonds that must be broken.

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If the pressure inside a hyperbaric chamber is 3.0 atm, what is the volume, in liters, of the chamber containing 2600 g of O2 at 26 °C?

Answers

Moles of O_2

2600g/32gmol^{-1}81.25mol

Now

[tex]\\ \rm\Rrightarrow V=\dfrac{nRT}{P}[/tex]

[tex]\\ \rm\Rrightarrow V=\dfrac{81.25(26)(8.314)}{3}[/tex]

[tex]\\ \rm\Rrightarrow V=5854.4L[/tex]

The volume of the gas in the chamber is equal to 664.36 L.

What is the ideal gas equation?

The ideal gas law is defined as an equation of the state of an ideal gas. This equation is written as the product of the volume and pressure of 1 mole gas is equal to the product of the gas constant and absolute temperature of the gas.

The mathematical formula of the ideal gas law is as follows:

PV = nRT

Where n is the moles of gas, V is the volume of the gas, R is the gas constant and P is the pressure.

The temperature of the gas in the chamber, T =  26° C = 299 K

The pressure of the gas, P = 3 atm

The value of the gas constant, R = 0.082 atm L/K mol

The number of moles of a given gas, n = 2600/32 = 81.25 mol

Substituting the values n, R, P, and T in the equation, we get:

3 × V = 81.25 × 0.082 × 299.15

V = 664.36 L

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If 4.0 L of a 4.6 M SrCl2 solution is diluted to 45 L , what is the molarity of the diluted solution

Answers

If 4.0 L of a 4.6M SrCl2 solution is diluted to 45L, the molarity of the diluted solution is 0.41M.

How to calculate molarity?

The molarity of a diluted solution can be calculated using the following formula:

M1V1 = M2V2

Where;

M1 = initial concentrationM2 = final concentrationV1 = initial volumeV2 = final volume

According to this question, 4.0 L of a 4.6M SrCl2 solution is diluted to 45L, the molarity of the diluted solution is calculated as follows:

4.6 × 4 = 45 × M2

18.4 = 45M2

M2 = 18.4/45

M2 = 0.41M

Therefore, if 4.0 L of a 4.6M SrCl2 solution is diluted to 45L, the molarity of the diluted solution is 0.41M.

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Calculate the mass of NaCO3 used in experiment. SHOW WORK — 15 points!!

Mass of empty evaporating dish: 46.233g
Mass of evaporating dish + sodium bicarbonate: 48.230g
Mass of evaporating dish + product after 1st drying: 47.504 g

Mass of evaporating dish: 46.233g
Mass of evaporating dish + product after 2nd drying: 47.485

Answers

The mass of sodium bicarbonate (NaHCO₃) used in the experiment is 1.997 g

Calculating mass

From the question we are to calculate the mass of NaHCO₃ (sodium bicarbonate) used in the experiment

From the given information

Mass of empty evaporating dish = 46.233g

Mass of evaporating dish + Sodium bicarbonate = 48.230g

Mass of sodium bicarbonate (NaHCO₃) = [Mass of evaporating dish + Sodium bicarbonate] - [Mass of empty evaporating dish]

Mass of sodium bicarbonate (NaHCO₃) = 48.230g - 46.233g

Mass of sodium bicarbonate (NaHCO₃) = 1.997 g

Hence, the mass of sodium bicarbonate (NaHCO₃) used in the experiment is 1.997 g

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Write the essential condition for the following reaction to take place:2AgBr—->2Ag+Br

Answers

This is the decomposition of silver bromide

Silver bromide decomposes to give silver and bromine

Sunlight is the decomposing agent .

The reaction takes place in sunlightHence it should be placed in sunlight

Answer:

Sunlight

Explanation:

For silver bromide (AgBr) to decompose into silver metal and bromine gas, it can only take place in the presence of sunlightThe balanced reaction :⇒ 2AgBr → 2Ag + Br₂

Balance the N-14(d,n) nuclear equation for radioisotope production in PET. This means to
write it out in equation form with 2 reactants and 2 products.

Answers

Dn= 22 N-14 PET reactant’s

If 10.0 moles of O₂ are reacted with excess NO in the reaction below, and only 8.0 mol of NO₂ were collected, then what is the percent yield for the reaction?
2 NO (g) + O₂ (g) → 2 NO₂ (g)

Answers

Answer:

Explanation:

General Remarks

The balance numbers are the same. (The balance numbers are 2 and 2)

The balance number in front of the O2 is 1.

So for every mole of O2 needed 2 moles of NO2 should be produced.

If 10.0 moles of oxygen is used, then you should get 20 mols of NO2 should be produced.

Formula

% yield = (what was produced / what should have been produced) *100

Givens

What was produced = 7 moles

What should have been produced = 20 moles

Solution

Substitute the givens into the equation

% yield = 8/20 * 100

% yield = 0.40 * 100

Answer: 40%

How many grams of acid will be neutralized by a Maalox antacid tablet that contains 0.350 g of CaCO3

Answers

The mass of the acid produced is 0.252 g from the information in the question.

What is neutralization?

The term neutralization refers to the reaction between an acid and a base that yileds salt and water only.

The equation of this reaction is; 2HCl + CaCO3 ----->CaCl2 + CO2 + H2O

Number of moles of CaCO3 =   0.350 g/100 g = 0.0035 moles

Since 2 moles of acid reacts with 1 mole of CaCO3

x moles acid reacts with 0.0035 moles of CaCO3

x = 0.007 moles

Mass of acid = 0.007 moles * 36 g/mol = 0.252 g

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When calcium carbonate is heated strongly, carbon dioxide is evolved.

CaCO3 > CaO + CO2

If 4.74g of calcium carbonate is heated, what volume of CO2 would be produced when collected at STP?

Show all steps (Answer: 1.06L)

Answers

If 4.74 g of calcium carbonate is heated, the volume of [tex]CO_2[/tex] that would be produced at STP will be 1.08 L

Volume of gas at STP

From the equation of the reaction:

[tex]CaCO_3 --- > CaO + CO_2[/tex]

The mole ratio of [tex]CaCO_3[/tex] and [tex]CO_2[/tex] is 1:1

Mole of 4.74 g  [tex]CaCO_3[/tex] = 4.74/100 = 0.0474 moles

Equivalent mole of [tex]CO_2[/tex] = 0.0474 moles

1 mole of gas at STP = 22.71 L

0.0474 moles  at STP = 22.71 x 0.0474 = 1.08 L

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Q3. Which of the following
Elements is likely to
form cations?

A. Titanium (T:)
B. Carbon
C. Bromine
(Br)
) (Ar
D. Argon

Answers

Answer:

Titanium

Explanation:

titanium can form 4+ cations

An atom has the amount of 50 electrons, what is the value of the principal quantum number

Answers

Explanation:

The atomic number of Uranium is 92. The electron configuration is: [U] = [Rn] 5f3; 7s4 where Radon Rn has 86 electrons and a complete period. This result is respecting the Madelung. BUT … U is an exception !!!

On the period 7 are only 6 electron left for Uranium (92–86). The first 2 electrons are on the principal energy level 7 and occupy the 7s-orbital block. The 3rd electron is placed in the 5f-orbital block. The next 3 electrons are place here as well. The last electron has the unique quantum label (n; l; ml; s) = (5; 3; 0; 0)

To understand this: The first electron of the 5f-orbital block has the label (5; 3, -3; 0). The following electrons have the labels (5; 3; -2, 0), (5; 3; -1; 0), (5; 2; 0; 0). You notice, that the HUND’S RULE is satisfied. ( I always use head 0 before tail 1 to represent the spin.) The f-orbital block is made up of 7 orbitals and therefore can be filled up by at most 14 electrons. When the first electron has the spin 0 then the next 6 electrons must also have the spin 0. With the electron 8 you get the label (5; 3; -3, 1) which tells us, that the spin is opposite to 0. It must be 1. The next 6 electrons also will have spin 1 but are placed in the orbitals -2; -1; 0; 1; 2; 3. Their labels are: (5; 3; -2; 1), (5; 3; -1; 1), (5; 3; 0; 1), (5; 3; 1; 1), (5; 3; 2; 1) and (5; 3; 3; 1) Now the f-block is full !!!

ANSWER: The last electron of U has the label (5; 3; 0; 0). BUT … !!!!!

I hope that you can verify now the correctness of the answer by yourself according to the Madelung.

Please, apply the definitions of the 4 quantum numbers correctly by also respecting the MANDELUNG’S RULE, the OCTET RULLE, the HUND’S RULE.

NOTICE: The Madelung has 21 exceptions. (Wikipedia lists only 20 and treats Ni not as an exception)

Cr, Ni, Cu, Nb, Mo, Ru, Rh, (Pd), Ag, Pt, Au and

La, Ce, Gd, Ac, (Th), Pa, U, Np, Cm, Lr.

In the first group listed: 1 electron moves inwards. In the second group listed: 1 electron moves outwards. Pd and Th have 2 moving electron each. YOU CAN SEE, THAT U IS AN EXCEPTION !!!

CORRECT ANSWER: The last electron of U has the label (6; 2; 0; 0). Can you see the moving electron ??? ❮❮(5; 3; 0; 0) becomes (6; 2; 0; 0)❯❯ Can you see the moving outwards ???

The 21 exception were discovered with spectral analysis. The MADELUNG is not a principle !!! It is only a very simple rule to memorise the electron configurations. By respecting the exceptions, you can correct you Madelung answer !!! Learn the 21 exceptions by heart !

Did you get it ??? (6; 2; 0; 0) is the label of the last electron of U.

The first ionization energy of mercury is 1006 kJ/mol. The energy change for the reaction Hg(l) →Hg+(g) + e– is therefore

Answers

For the first ionization energy of mercury is 1006 kJ/mol. The energy change for the reaction  is mathematically given as

dH = 1006KJ/mol

What is the energy change for the reaction?

The amount of energy required to remove an electron from a neutral atom is called ionization energy. from the question, the electron is removed from the neutral atom Hg to give the first ionization energy

Hg→Hg +e

therefore the energy change for the reaction is

dH = 1006KJ/mol

In conclusion, the energy change for the reaction is

dH = 1006KJ/mol

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Predict the missing component in the nuclear equation

11C -> X + 0e
6 1

Answers

Answer:

A. Boron-11 with atomic number 5

A fossil is 3 half-life old. Measured Uranium-235 has half-life of 704 million years. How many years old is this fossil?

Answers

Answer: Uranium is not a problem in this case, as its radioactivity is very low. This is due to the long half-life. How much uranium will decay per second with a half-life of 700 million years? This is a very insignificant figure.

Select the correct answer.
Why are metals good conductors of heat and electricity?
A.
anions rotate around the stationary electrons
B.
cations rotate around the stationary electrons
C.
free moving atoms in metals carry both heat and electric current
D.
free moving electrons in metals carry both heat and electric current
E.
free moving protons in metals carry both heat and electric current

Answers

Answer:

D

Explanation:

the correct answer is D

Consider these equations: 2S(s)+3O2(g)→2SO3(g) , ΔH=−792kJ 2S(s)+2O2(g)→2SO2(g) , ΔH=−594kJ 2SO2(g)+O2(g)→2SO3(g) , ΔH=? What is the missing ΔH ? −294kJ −198kJ +198kJ +294kJ

Answers

Hess law can help us to obtain the enthalpy of a series of reactions by summation. The missing enthalpy of this reaction is −198kJ.

What is  Hess law?

According to the Hess law of constant heat summation, the enthalpy of a sequence of reactions can be obtained as the sum of the enthalpies of all the reactions.

Now looking at all the reavtion written here in order to obtain the missing enthalpy, we conclude that the missing enthalpy is −198kJ.

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2SO2 (g) + O2 (g)→2SO3 (g), ΔH = −198 kJ.

Which statement about geologic times are true? ~Pick multiple answers~

Answers

Answer:

the correct answers are A,D,E, and G

Explanation:

Does cooking temperature affect the concentration of ethanoic acid in vinegar, measured by acid-base titration?

Answers

Yes it will.

Explanation:

 At cooking temperature the concentration of ethanoic acid may be affected as the solution will boil therefore evaporating the water that will increase the concentration of acid in the solution.

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