An unknown substance with a mass of 83 grams absorbs 1,108 J while undergoing a
temperature increase of 11 °C. What is the specific heat of the substance?
Look at picture
ASAP please will mark as brainlist don’t got much time
Answers
Answer:
The specific heat of the substance is 1.21 [tex]\frac{J}{g*C}[/tex]
Explanation:
Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
There is a direct proportional relationship between heat and temperature. The constant of proportionality depends on the substance that constitutes the body as on its mass, and is the product of the specific heat by the mass of the body. So, the equation that allows calculating heat exchanges is:
Q = c*m*ΔT
where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.
In this case:
Q=1108 J c= ? m= 83 g ΔT= 11 CReplacing:
1108 J= c*83 g* 11 C
Solving:
[tex]c=\frac{1108 J}{83 g* 11 C}[/tex]
c= 1.21 [tex]\frac{J}{g*C}[/tex]
The specific heat of the substance is 1.21 [tex]\frac{J}{g*C}[/tex]
Related Questions
10. Which of these elements is the most electronetative?
(10 Points)
Nitrogen
Calcium
Bromine
O Aluminum
Answers
Nitrogen is only a few electrons difference than Fluorine. Bromine is still quite electronegative but it has whole extra valence shells making it not as electronegative as nitrogen
Venus is the second planet from the Sun. It takes about 225 days for it to complete one revolution. What would make Venus have a longer revolution?
if Venus rotated slower
if Venus were closer to the Sun
if Venus rotated faster
if Venus were farther away from the Sun
Answers
Answer:
if venus were farther away from the sun
Explanation:
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When energy is released by the pack, what happens to the energy of the surroundings (outside the pack)?
a. The energy increases
b. The energy decreases
c. The energy stays the same
Answers
Answer:
a
Explanation:
i hope that's correct
The energy of the surroundings (outside the pack) will:
a. The energy increases, when energy is released.
Energy in the surroundings:Energy is delivered to create bonds, which is the reason the enthalpy change for it is positive to break bonds. Energy is expected to break bonds. Particles are a lot more joyful when they are "wedded" and discharge energy since it is simpler and more steady to be seeing someone.
When energy is released, the energy in the surroundings will increase.
Thus, option a is correct.
Find more information about Energy here:
brainly.com/question/25959744
To prepare 800mL of 1M phosphate buffer of pH 7.2 (PKa=7.1), by using salt = K2HPO4 and acid = KH2PO4, the quantity of salt required is
Answers
Answer:
78.04g of 0.448 moles must be added
Explanation:
Using H-H equation we can find the pH of the buffer:
pH = pKa + log [A⁻] / [HA]
Where pH is the pH of the buffer = 7.2
pKa = 7.1
[A⁻] = [K₂HPO₄]
[HA] = [KH₂PO₄]
Replacing:
7.2 = 7.1 + log [K₂HPO₄] / [KH₂PO₄]
0.1 = log [K₂HPO₄] / [KH₂PO₄]
1.2589 = [K₂HPO₄] / [KH₂PO₄] (1)
And as the concentration of the buffer is:
1M = [K₂HPO₄] + [KH₂PO₄] (2)
Replacing (2) in (1):
1.2589 = 1M - [KH₂PO₄] / [KH₂PO₄]
1.2589 [KH₂PO₄] = 1M - [KH₂PO₄]
2.2589 [KH₂PO₄] = 1M
[KH₂PO₄] = 0.44M
And [K₂HPO₄] = 0.56M
In 800mL = 0.8L:
0.8L * (0.56mol / L) = 0.448 moles K₂HPO₄. The mass is -Molar mass K₂HPO₄: 174.2g/mol-:
0.448 moles * (174.2g / mol) =
78.04g of 0.448 moles must be addedWhy do surface waves break along the shore?
Answers
Answer:
because the global sea level rises while the poles temperature increases
Explanation:
PLEASE HELP ASAP I'LL MARK BRAINLIEST
Thank you :)
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Answers
Answer:
Its velocity was 7.8 km/s northward.
Explanation:
Because the meteor was only 45 m wide and was 27,700 km above Earth's surface it was not visible with the aid of a telescope.
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Answer:
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Answer:
Explanation:
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Answer:
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alll I really know is that it includes smaller pools of water
1 point
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True
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Why does lowering the pressure cause a liquid to boil?
A. It becomes easier for molecules to escape.
B. It pushes molecules out of the liquid.
C. It causes the temperature to rise.
D. It changes the volume of the liquid.
Answers
Lowering the pressure in a container will cause the liquid in the container to boil faster because it becomes easier for the molecules to escape.
What causes boiling?Boiling happens when the vapor pressure of a liquid equals the atmospheric pressure.
By lowering the atmospheric pressure, the vapor pressure of a liquid takes a lower time to equal the atmospheric pressure.
Thus, it becomes easier for the molecules of the liquid to escape from each other.
More on boiling and pressure can be found here: https://brainly.com/question/2510654
How much energy is needed to heat 9.3 grams of silver metal from 21 °C to 52 °C, if the
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Question 5
4 pts
How much heat must be added if 160 grams of water is heated from 24 °C to 85 °C?
(The specific heat of water is 4.184 J/g °C)
Look at picture
ASAP please will mark as brainlist don’t got much time
Answers
Answer:
question 4. 69.19J
question 5. 40835.84J
Explanation:
question4.
heat needed = mass × specific heat capacity × change in temperature
= 9.3× 0.240×(52-21)
=69.192J
question 5.
heat added = 160× 4.184×(85-24)
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I
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Answers
Answer:
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Explanation:
Gasoline is equivalent to C8H18
to convert molecule to gram you have to convert molecules to mols first.
Using Avocado's number we can figure that out.
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P.S: SORRY IF THIS DOESNT HELP!! I dont know if they are talking about the actual formula for gasoline.
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:)
I WILL GIVE BRAINLIST!!!!!!!!!!!!!!!!!!!!!! PLZZZZZZZZZ HELPPPPPPPPPPPPPP
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