Thermal Physics Mcq
IB Thermal Physics MCQ questions ( Higher)
1. Thermal energy is transferred through the glass windows of a house mainly by
A. conduction.
B. radiation.
C. conduction and convection.
D. radiation and convection.
2. The first law of thermodynamics may be expressed in terms of the quantities below.
DU, the increase in the internal energy of the system Q, the energy transferred to the system by heating W, the work done on the system
Which one of the following is a correct statement of the law?
A. W = DU + Q
B. W = −DU − Q
C. W = DU − Q
D. W = −DU + Q
3. A well-insulated container is divided into two equal volumes by a wall. In one half there is an ideal gas and the other is a vacuum as shown below.
The wall is now removed. Which one of the following correctly gives the changes, if any, that take place in the internal energy and entropy of the gas?
Internal energy|Entropy|
A.|stays the same|stays the same|
B.|stays the same|increases|
C.|decreases|stays the same|
D.|decreases|increases|
4. Two bodies are brought into thermal contact with each other. No thermal energy transfer takes place between the bodies. It may be deduced therefore, that the bodies must have the same
A. specific heat capacity.
B. heat capacity. C. temperature. D. internal energy.
5. An ideal gas expands isothermally, doing 2500 J of external work in the process. The thermal energy absorbed by the gas in this process is
A. zero.
B. less than 2500 J.
C. equal to 2500 J.
D. more than 2500 J.
6. Which one of the following correctly describes the changes, if any, of the kinetic energy and the potential energy of the molecules of a liquid as it is boiling?
Kinetic energy|Potential energy|
A.|increases|increases|
B.|increases|stays constant|
C.|stays constant|increases|
D.|stays constant|stays constant|
7. The diagram shows the pressure / volume (p/V) diagram for one cycle PQRS of an engine.
In which sections of the cycle is work done on the engine?
A.
1. Thermal energy is transferred through the glass windows of a house mainly by
A. conduction.
B. radiation.
C. conduction and convection.
D. radiation and convection.
2. The first law of thermodynamics may be expressed in terms of the quantities below.
DU, the increase in the internal energy of the system Q, the energy transferred to the system by heating W, the work done on the system
Which one of the following is a correct statement of the law?
A. W = DU + Q
B. W = −DU − Q
C. W = DU − Q
D. W = −DU + Q
3. A well-insulated container is divided into two equal volumes by a wall. In one half there is an ideal gas and the other is a vacuum as shown below.
The wall is now removed. Which one of the following correctly gives the changes, if any, that take place in the internal energy and entropy of the gas?
Internal energy|Entropy|
A.|stays the same|stays the same|
B.|stays the same|increases|
C.|decreases|stays the same|
D.|decreases|increases|
4. Two bodies are brought into thermal contact with each other. No thermal energy transfer takes place between the bodies. It may be deduced therefore, that the bodies must have the same
A. specific heat capacity.
B. heat capacity. C. temperature. D. internal energy.
5. An ideal gas expands isothermally, doing 2500 J of external work in the process. The thermal energy absorbed by the gas in this process is
A. zero.
B. less than 2500 J.
C. equal to 2500 J.
D. more than 2500 J.
6. Which one of the following correctly describes the changes, if any, of the kinetic energy and the potential energy of the molecules of a liquid as it is boiling?
Kinetic energy|Potential energy|
A.|increases|increases|
B.|increases|stays constant|
C.|stays constant|increases|
D.|stays constant|stays constant|
7. The diagram shows the pressure / volume (p/V) diagram for one cycle PQRS of an engine.
In which sections of the cycle is work done on the engine?
A.