# Temperature, Heat and First Law of Thermodynamics - Chapter No 16

Right Answers have been shown below in red color.

1. If two objects are in thermal equilibrium with each other:

A. they cannot be moving
B. they cannot be undergoing an elastic collision
C. they cannot have different pressures
D. they cannot be at different temperatures
E. they cannot be falling in Earth’s gravitational field

2. When two gases separated by a diathermal wall are in thermal equilibrium with each other:

A. only their pressures must be the same
B. only their volumes must be the same
C. they must have the same number of particles
D. they must have the same pressure and the same volume
E. only their temperatures must be the same

3. A balloon is filled with cold air and placed in a warm room. It is NOT in thermal equilibrium with the air of the room until:

A. it rises to the ceiling
B. it sinks to the floor
C. it stops expanding
D. it starts to contract
E. none of the above

4. Suppose object C is in thermal equilibrium with object A and with object B. The zeroth law of thermodynamics states:

A. that C will always be in thermal equilibrium with both A and B
B. that C must transfer energy to both A and B
C. that A is in thermal equilibrium with B
D. that A cannot be in thermal equilibrium with B
E. nothing about the relationship between A and B

5. The zeroth law of thermodynamics allows us to define:

A. work
B. pressure
C. temperature
D. thermal equilibrium
E. internal energy

6. If the zeroth law of thermodynamics were not valid, which of the following could not be considered a property of an object?

A. Pressure
B. Center of mass energy
C. Internal energy
D. Momentum
E. Temperature

7. The international standard thermometer is kept:

A. near Washington, D.C.
B. near Paris, France
C. near the north pole
D. near Rome, Italy
E. nowhere (there is none)

8. In constructing a thermometer it is NECESSARY to use a substance that:

A. expands with rising temperature
B. expands linearly with rising temperature
C. will not freeze
D. will not boil
E. undergoes some change when heated or cooled

9. The “triple point” of a substance is that point for which the temperature and pressure are such that:

A. only solid and liquid are in equilibrium
B. only liquid and vapor are in equilibrium
C. only solid and vapor are in equilibrium
D. solid, liquid, and vapor are all in equilibrium
E. the temperature, pressure and density are all numerically equal

10. Constant-volume gas thermometers using different gases all indicate nearly the same temperature when in contact with the same object if:

A. the volumes are all extremely large
B. the volumes are all the same
D. the pressures are all extremely large
C. the pressures are the same
E. the particle concentrations are all extremely small

11. A constant-volume gas thermometer is used to measure the temperature of an object. When the thermometer is in contact with water at its triple point (273.16 K) the pressure in the
thermometer is 8.500 × 104 Pa. When it is in contact with the object the pressure is 9.650 × 104 Pa. The temperature of the object is:

A. 37.0 K
B. 241 K
C. 310 K
D. 314 K
E. 2020 K

12. When a certain constant-volume gas thermometer is in thermal contact with water at its triple point (273.16 K) the pressure is 6.30 × 104 Pa. For this thermometer, a kelvin corresponds to a change in pressure of about:

A. 4.34 × 102 Pa
B. 2.31 × 102 Pa
C. 1.72 × 103 Pa
D. 2.31 × 103 Pa
E. 1.72 × 107 Pa

13. The diagram shows four thermometers, labeled W, X, Y, and Z. The freezing and boiling points of water are indicated. Rank the thermometers according to the size of a degree on their scales, smallest to largest. A. W, X, Y, Z
B. Z, Y, X, W
C. Z, Y, W, X
D. Z, X, W, Y
E. W, Y, Z, X

14. There is a temperature at which the reading on the Kelvin scale is numerical:

A. equal to that on the Celsius scale
B. lower than that on the Celsius scale
C. equal to that on the Fahrenheit scale
D. less than zero
E. none of the above

15. Fahrenheit and Kelvin’s scales agree numerically at a reading of:

A. -40
B. 0
C. 273
D. 301
E. 574

16. Which one of the following statements is true?

A. Temperatures differing by 25◦ on the Fahrenheit scale must differ by 45◦ on the Celsius scale
B. 40 K corresponds to −40◦ C
C. Temperatures which differ by 10◦ on the Celsius scale must differ by 18◦ on the Fahrenheit scale
D. Water at 90◦ C is warmer than water at 202◦ F
E. 0◦ F corresponds to −32◦ C

17. A Kelvin thermometer and a Fahrenheit thermometer both give the same reading for a certain sample. The corresponding Celsius temperature is:

A. 574◦ C
B. 232◦ C
C. 301◦ C
D. 614◦ C
E. 276◦ C

18. Room temperature is about 20 degrees on the:

A. Kelvin scale
B. Celsius scale
C. Fahrenheit scale
D. absolute scale
E. C major scale

19. A thermometer indicates 98.6◦ C. It may be:

A. outdoors on a cold day
B. in a comfortable room
C. in a cup of hot tea
D.in a normal person’smouth
E. in liquid air

20. The air temperature on a summer day might be about:

A. 0◦ C
B. 10◦ C
C. 25◦ C
D. 80◦ C
E. 125◦ C