Thermodynamics Test

Result

Thermodynamics Test - 53

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Question 1
4 / -1

A

B

C

D

Solution
Question 2
4 / -1

During an adiabatic expansion of 2 moles of a gas, the change in internal energy was found – 50 J. The work done during the process is

A
Zero

B
100 J

C
– 50 J

D
50 J

Solution
Question 3
4 / -1

During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio C_p/C_v for the gas is

A

B

C
2

D

Solution
Question 4
4 / -1

In adiabatic expansion of a gas

A
Its pressure increases

B
Its temperature falls

C
Its density increases

D
Its thermal energy increases
Question 5
4 / -1

Which property of the system does not change in an adiabatic process?

A
Volume

B
Temperature

C
Density

D
Total amount of heat
Question 6
4 / -1

5.6 litres of helium gas at STP is adiabatically compressed to 0.7 litre. Taking the initial temperature to be T₁, the work done in the process is

A

B

C

D

Solution
Question 7
4 / -1

In changing the state of a gas adiabatically from an equilibrium state A to another equilibrium state B, an amount of work equal to 22.3 J is done on the system. If the gas is taken from state A to B via a process in which the net heat absorbed by the system is 9.35 calories, the net work done by the system in latter case will be

A
5.9 J

B
16.9 J

C
9.3 J

D
4.6 J

Solution
Question 8
4 / -1

A thermally insulated vessel contains an ideal gas of molecular mass M and ratio of specific heats γ . It is moving with speed v and is suddenly brought to rest. Assuming no heat is lost to the surroundings, its temperature increases by

A

B

C

D

Solution
Question 9
4 / -1

A gas is compressed at a constant pressure of 50 N/m² from a volume of 10 m³ to a volume of 4 m³. Energy of 100 J then added to the gas by heating. Its internal energy is

A
Increased by 400 J

B
Increased by 200 J

C
Increased by 100 J

D
Decreased by 200 J

Solution
Question 10
4 / -1

In which process the PV indicator diagram is a straight line parallel to volume axis?

A
Isothermal

B
Isobaric

C
Irreversible

D
Adiabatic