the enthalpy of combustion of gasoline is about 45 kj/g. the amount of energy needed to heat 1 g of water from 20 °c to 100 °c is 80 °c x 4.18/g•°c. the enthalpy of vaporization of water is 2540 j/g. what mass of water at 20 °c can 1 g of gasoline heat and boil?

Answers

Answer 1

The mass of water that can be boiled by 1 g of gasoline by raising its temperature from 20 °c to 100 °c is  17.6 g.

Now, we know that energy can not be created nor destroyed but it can be converted from one form to another.

The heat produced by the gasoline is equal to the heat gained by water. Mathematically;

1g ×  45 × 10^3 = [1 g × 4.18  × (100 - 20) + 2540m]

45 × 10^3 = 334.4 + 2540m

45 × 10^3 - 334.4 =  2540m

m =  45 × 10^3 - 334.4 /2540

m = 17.6 g

The mass of water that can be boiled by 1 g of gasoline by raising its temperature from 20 °c to 100 °c is 17.6 g.

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Related Questions

How does melting order relate to melting point?

A. The substance that melted the quickest has the highest melting point.

B. The substance that took the longest to melt has the lowest melting point.

C. The substance that melted third to last has the lowest melting point.

D. The substance that took the longest to melt has the highest melting point.

Answers

Answer:

I think A.

Explanation:I say A because of the substance melting the quicking does have the highest melting point because its the highest.

Why do we fill balloons
with helium gas instead
of oxygen gas?

Answers

Answer:

Helium is less dense. Because helium is lighter than air, a helium balloon rises, just as an air bubble rises in more dense water

Explanation:

Also why not. It just is.

Answer:

This is due to the fact that helium has a lower density. A helium balloon rises like an air bubble in more dense water because helium is lighter than air. Another gas lighter than air is hydrogen, which is even lighter than helium.

Explanation:

Identify the location of oxidation in an electrochemical cell.

Answers

Answer:

Anode

Explanation:

Electrochemical cells have two conductive electrodes, called the anode and the cathode. The anode is defined as the electrode where oxidation occurs.

Can someone answer that first this pls im lost

Answers

-Just look up “H2O lewis structure
-1.5
-Don’t know the VSEPR
-Polar Covalent
-Again, don’t know VSEPR
-Just look up H2O molecule

If the average speed of a car is 45 km/hr, how far can it travel in 0.5 hours

Answers

Answer:

22.5 Km

Explanation:

45km/hr * 0.5 hr = 22.5km

what is the ground-state electron configuration of a neutral atom of iron?

Answers

Iron is a transition metal and a transition metal has more than one oxidation state or valency for ex.
Theres Fe2+ or iron(II)
And there’s Fe3+ or iron(III)

Does molasses need to be refrigerated after opening?

Answers

Once you opened the jar or bottle, the most important thing that you need to remember is to keep it tightly sealed when not in use. There is really no need to refrigerate molasses after opening but it should help in retaining the quality for longer.


If a car is moved 10 meters and 3 Newton's of force is needed to move the car, what amount of workhas
been done?

Answers

Work required = 30J

This is because work = F * x

F (Newton's force) = 3N

x (car moved) = 10m

Work = 3 * 10 = 30J

Which of the following are elements? (Select all that apply.)
KCl
Na
C
H2O

Answers

Answer:

Na(Sodium) and C(Carbon) only

Answer:

Na, C

Explanation:

1. KCl, or potassium chloride, is a combination of two elements- so it's a chemical compound.

2. Na, or sodium, can be found on the periodic table of elements. Therefore, it is an element.

3. C, or carbon, can also be found on the periodic table of elements. Therefore, it is an element.

4. H20, or water, is a combination of 2 hydrogen atoms that bonded into an oxygen atom. Combination of 2 or more elements is a chemical compound.

Therefore, the answers are Na and C.

how would you distinguish a simple microscope from a compound one​

Answers

Answer:

A simple microscope employs a concave mirror. A compound microscope employs a plane mirror at one side and a concave mirror at the other. It contains only one adjustment screw to move the limb up and down for focusing on the object.

Answer:

D po

Explanation:

Sana nakatutulong

#Carry on learning

Pa brainliest po

What will the final temperature of the a block of brass with a mass of 30.6 g is at 87.4°C
after it's added to 62.3 g of water at 28.3°C. The specific heat of aluminum is 0.380
J/gºC.

Answers

The final temperature of the block of brass with a mass of 30.6 g at 87.4°C is 30.82°C.

SPECIFIC HEAT CAPACITY:

The amount of heat absorbed or released by a substance can be calculated using the following formula:

Q = m × c × ∆T

Q(water) = - Q(metal)

(m × c × ∆T) water = - (m × c × ∆T) metal

According to this question;

METAL:

m = 30.6gc = 0.380 J/g°C∆T = T - 87.4°C

WATER:

m = 62.3gc = 4.184J/g°C∆T = T - 28.3°C

62.3 × 4.184 × (T - 28.3) = - {30.6 × 0.380 × (T - 87.4)}

260.7T - 7376.8 = - {11.63T - 1016.3}

260.7T - 7376.8 = -11.63T + 1016.3

260.7T + 11.63T = 1016.3 + 7376.8

272.33T = 8393.1

T = 8393.1 ÷ 272.33

T = 30.82°C

Therefore, the final temperature of the block of brass with a mass of 30.6 g at 87.4°C is 30.82°C.

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In Experiment 1, what volume did the propane gas occupy in the Erlenmeyer flask before the addition of any water?

Answers

This question is mentioning an experiment that is not being described about the volume of the propane gas in an Erlenmeyer before the addition of water.

In this case, since no information is given, it is possible to propose a suggested procedure of how to figure it out via gas laws, specifically, the ideal gas one, since no change is decribed before the addition of water:

[tex]PV=nRT[/tex]

Thus, you can solve for the volume, by dividing both sides by the pressure, so that you will get:

[tex]V=\frac{nRT}{P}[/tex]

Now, to ensure a correct calculation, make sure you have the moles (divide by the molar mass of propane, 44,1 g/mol, if you were given the grams), the temperature in K (add 273.15 if you have degree Celsius), the ideas gas constant as 0.08206 and the pressure in atm, in order to have consistent units.

If you need the volume in milliliters, you will need to multiply the previous answer by 1000 in order to perform the appropriate conversion.

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What is the molarity of a HCl solution, if 28.6 mL of a 0.175 m NaOH solution is needed to neutralize a 25.0 mL sample of the HCl solution

Answers

The molarity of the HCl solution needed to neutralize 28.6 mL of a 0.175 M NaOH solution is 0.2002 M

We'll begin by writing the balanced equation for the reaction. This is given below:

HCl + NaOH —> NaCl + H₂O

From the balanced equation above,

The mole ratio of the acid, HCl (nA) = 1

The mole ratio of the base, NaOH (nB) = 1

From the question given above, the following data were obtained:

Volume of base, NaOH (Vb) = 28.6 mL

Molarity of base, NaOH (Mb) = 0.175 M

Volume of acid, HCl (Va) = 25 mL

Molarity of acid, HCl (Ma) = ?

The molarity of the acid, HCl can be obtained as follow:

MaVa / MbVb = nA / nB

(Ma × 25) / (0.175 × 28.6) = 1

(Ma × 25) / 5.005 = 1

Cross multiply

Ma × 25 = 5.005

Divide both side by 25

Ma = 5.005 / 25

Ma = 0.2002 M

Therefore, the molarity of the acid, HCl needed for the reaction is 0.2002 M

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2. The mass number tells the total number of
nucleus of an atom. These particles collectively are called
both are located in the nucleus.

Answers

Answer: The mass number tells the number of protons.

Explanation:

What’s a conjugative Bas of OH-

Answers

Answer:

the answer is O²- hopefully

Compound Y dissolves in ethanol but not water what type of bond is Y ?

Answers

Covalent Bond.

Explanation: Covalent compound are soluble in organic solvents (non polar) but insoluble in water (polar).

Ethanol being both polar and non polar can dissolve covalent compound.

I NEEEED HEEELPPEPEPEPEPEPPE
chemical equations for sodium sulphate, potassium sulphate, magnesium sulphate, calcium sulphate

Answers

Explanation:

2NaOH + H2SO4 --> Na2SO4 + 2H2O

2KOH + H2SO4 --> K2SO4 + H2O

Mg(OH)2 + H2SO4 --> MgSO4 + 2H2O

Ca(OH)2 + H2SO4 --> CaSO4 + 2H2O

what happens when phosphorus forms an ion?

Answers

Answer:

Phosphorus would form a -3 charge

Explanation:

Phosphorus has five outer electrons that can bind  atoms. As a result, Phosphorus forms a ion has a charge of -3.

Assume trilobites went extinct 248 million years ago.
If a trilobite is found in a rock layer, what do you
know about the age of that rock layer?

Answers

Answer:

the rock layer is at least 248 million years old

Explore


Astronomers often scan the sky using devices called radio
telescopes. What can you conclude about these devices?

Answers

Answer:

A radio telescope is simply a telescope that is designed to receive radio waves from space.

radio telescopes helps to study naturally occurring radio light from stars, galaxies, black holes, and other astronomical objects. We can also use them to transmit and reflect radio light off of planetary bodies in our solar system.

Answer: stronomers often scan the sky using devices called radio telescopes. What can you conclude about these devices? ... They pick up the radio waves emitted by stars.

Are bath bombs pure substances or mixtures

Answers

Answer:

Yes.

Explanation:

Bath bombs are usually made from three key ingredients: baking soda, citric acid and cornstarch, said Frankie Wood-Black, an instructor in chemistry at Northern Oklahoma College and an experienced bath-bomb maker. Often, bath bombs also include dyes and perfumes, and sometimes they have epsom salt.

Answer: yes

Explanation:

Holding a marshmallow near a campfire flame causes it to turn brown even if the marshmallow does not touch the flame. Why does this happen?
A.
Dust blowing through the air causes the marshmallow to brown.
B.
Hot air in the atmosphere cooks the marshmallow.
C.
Heat radiates from the fire and cooks the marshmallow.
D.
Smoke and soot from the fire cause the marshmallow to brown.

Answers

Answer:

The answer is, C. Heat radiates from the fire and cooks the marshmallow.

Answer:

C Heat radiates from the fire and cooks the marshmallow.

Explanation:

Heat can be transferred through space through the process of radiation. The marshmallow is toasted because heat radiates from the fire and cooks the marshmallow.

What causes a change in speed or direction?
A) Balanced Force
B) Net Force
C) Force

Answers

Answer:

force i think

Explanation:

Classify each of the following as abiotic or biotic.
A. Sand
B. Grass
C. Air
D. Rabbits and deer
E. Humans

Answers

Answer:

D.

Explanation:

#I'm not sure#happy learning
uhm a.
i dont really kniw what the answer is but its okay youll figure it out

Compare the box on the left containing the reactants in a chemical reactions. Which box on the right is the correctly represents the products according to the Law of Conservation of mass?

A) A.

B) B.

C) C.

D) D. ​

Answers

Answer:

d is the right answer

please mark me brainlist

What was the effect of increasing the water's mass?

Answers

-the final temp was lower
-water has a high capacity

True or false? Simple molecular substances contain delocalised electrons.

Answers

Answer:false

Explanation:

Put the substance in a 25 mL beaker.
Now, observe and record the following:
state of matter:
appearance and texture:
crystalline structure:

Answers

Answer:

liquid no not a solid

Explanation:

When you put the substance in a 25 mL beaker. then the state of matter is solid, appearance and texture are powdered and crystalline structure is not solid(powder).

What are crystalline structures and states of matter?

The term "crystalline structure" refers to the arrangement of atoms, ions, or molecules in a crystalline solid. A crystalline solid is a type of material where the constituent particles are arranged in a regular, repeating pattern. This regular arrangement results in a characteristic geometric shape for the crystals. Examples of crystalline solids include salt, sugar, and diamond.

On the other hand, the term "state of matter" refers to the physical form in which matter exists. There are three primary states of matter: solid, liquid, and gas.

Solids have a definite shape and volume and their constituent particles are held tightly together by strong intermolecular forces.

Liquids have a definite volume but no definite shape, and their constituent particles are held together by weaker intermolecular forces.

Gases have no definite shape or volume, and their constituent particles are far apart and move freely.

Other states of matter, such as plasma and Bose-Einstein condensate, also exist but they are less common in everyday life.

Therefore, the state of matter: is solid, its appearance and texture: are powdered, and the crystalline structure: is not solid.

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Which ion has the correct charge?

07-

Na 2+

N 3+

Ca2+

Answers

Answer:

Ca(2+)

Explanation:

Sodium (Na) only have one valence electron and will lose it in order to gain a full octet. There will be an unbalance of electrons and protons where there are more protons there electrons. The correct ion formula for sodium is Na (1+).

Nitrogen has 5 valence electrons and will gain three more to gain a full octet. There will be an unbalance where there are more electrons then protons. Nitrogen will form the ion N (3-).

Calcium has two valence electrons and will lose them in order to gain a full octet. There will be an unbalance where there are more protons then electrons. Calcium will form the ion Ca 2+

Therefore, Ca2+ is the ion with the correct charge.

Gold's natural state has a definite shape and a definite volume. What is gold's natural state(s)?
O solid
liquid
ОООО
solid or gas
O liquid or gas

Answers

Answer:

Solid

Explanation:

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