Thermal Properties
7 Questions
| Attempts: 120
This is just a sample.
Questions and Answers
- 1.
What is the SI unit of specific heat capacity?
- A.
J/kg
- B.
J/(kgK)
- C.
Jkg/K
- D.
JK/kg
Correct Answer
B. J/(kgK) -
- 2.
Internal energy is
- A.
Thermal energy that a body possesses
- B.
The sum of kinetic energy and potential energy of a body
- C.
The sum of molecular kinetic energy and molecular potential energy of a body
- D.
The average molecular kinetic energy and average molecular potential energy of a body
Correct Answer
C. The sum of molecular kinetic energy and molecular potential energy of a body -
- 3.
The specific heat capacity of a pure substance
- A.
Depends on its structure
- B.
Is a fixed value
- C.
Does not depend on the purity of the substance
- D.
Is always changing as the temperature increases
Correct Answer
B. Is a fixed value -
- 4.
A block of copper weighs 3.0 kg. Copper has a specific heat capacity of 390 J kg-1K-1. It is cooled in the freezer so that the temperature drops from 25.0oC to 0.0oC. What is the total energy lost by the block of copper?
- A.
22950 J
- B.
23400 J
- C.
29250 J
- D.
32950 J
Correct Answer
C. 29250 J -
- 5.
(Continued from previous question)The block of copper is now taken out of the freezer and left in the room temperature environment (25oC). It takes 4 minutes for the copper to be reach thermal equilibrium of the room temperature. What is the rate of energy loss of the copper block?
- A.
4.75 J/s
- B.
4.88 J/s
- C.
121 J/s
- D.
122 J/s
Correct Answer
D. 122 J/s -
- 6.
Above is the video of a peanut used for heating the water in the test tube. The mass of the water is 10.0 g. The specific heat capacity of water is 4200 Jkg-1K-1. If the initial temperature of the water in the test tube was 25.0oC, and the final temperature of the water in test tube, when the peanut is fully combusted, is 26.3oC. Calculate the energy stored in the peanut.
Correct Answer
54.6J
54.6 J
54.6 Joules
54.6Joules - 7.
Explain why there will be no change in temperature when a liquid is boiling.
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Current Version
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Jul 30, 2011Quiz Edited by
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Jan 27, 2010Quiz Created by
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