First Law of Thermodynamics
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PHXI12:THERMODYNAMICS

371241 Unit mass of a liquid with volume \(V_{1}\) is completely changed into a gas of volume \(V_{2}\) at a constant external pressure \(P\) and temperature \(T\). If the latent heat of evaporation for the given mass is \(L\), then the increase in the internal energy of the system is

1 \({\rm{Zero}}\)
2 \(P\left(V_{2}-V_{1}\right)\)
3 \(L-P\left(V_{2}-V_{1}\right)\)
4 \(L\)
PHXI12:THERMODYNAMICS

371242 A cubical box containing a gas is moving with some velocity. If it is suddenly stopped, then the internal energy of gas

1 Decreases
2 Increases
3 Remains constant
4 May increases or decrease depending on the time interval during which box comes to rest
PHXI12:THERMODYNAMICS

371243 Assertion :
The internal energy of a real gas is function of both temperature and volume.
Reason :
Internal kinetic energy depends on temperature and internal potential energy depends on volume.

1 Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXI12:THERMODYNAMICS

371244 The amount of heat energy required to raise the temperature of \(1\;g\) of Helium at NTP, from \({T_1}\;K\) to \({T_2}\;K\) is

1 \(\frac{3}{8}\;{N_a}{k_B}\left( {{T_2} - {T_1}} \right)\)
2 \(\frac{3}{2}\;{N_a}{k_B}\left( {{T_2} - {T_1}} \right)\)
3 \(\frac{3}{4}\;{N_a}{k_B}\left( {{T_2} - {T_1}} \right)\)
4 \(\frac{3}{4}\;{N_a}{k_B}\left( {\frac{{{T_2}}}{{\;{T_1}}}} \right)\)
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PHXI12:THERMODYNAMICS

371241 Unit mass of a liquid with volume \(V_{1}\) is completely changed into a gas of volume \(V_{2}\) at a constant external pressure \(P\) and temperature \(T\). If the latent heat of evaporation for the given mass is \(L\), then the increase in the internal energy of the system is

1 \({\rm{Zero}}\)
2 \(P\left(V_{2}-V_{1}\right)\)
3 \(L-P\left(V_{2}-V_{1}\right)\)
4 \(L\)
PHXI12:THERMODYNAMICS

371242 A cubical box containing a gas is moving with some velocity. If it is suddenly stopped, then the internal energy of gas

1 Decreases
2 Increases
3 Remains constant
4 May increases or decrease depending on the time interval during which box comes to rest
PHXI12:THERMODYNAMICS

371243 Assertion :
The internal energy of a real gas is function of both temperature and volume.
Reason :
Internal kinetic energy depends on temperature and internal potential energy depends on volume.

1 Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXI12:THERMODYNAMICS

371244 The amount of heat energy required to raise the temperature of \(1\;g\) of Helium at NTP, from \({T_1}\;K\) to \({T_2}\;K\) is

1 \(\frac{3}{8}\;{N_a}{k_B}\left( {{T_2} - {T_1}} \right)\)
2 \(\frac{3}{2}\;{N_a}{k_B}\left( {{T_2} - {T_1}} \right)\)
3 \(\frac{3}{4}\;{N_a}{k_B}\left( {{T_2} - {T_1}} \right)\)
4 \(\frac{3}{4}\;{N_a}{k_B}\left( {\frac{{{T_2}}}{{\;{T_1}}}} \right)\)
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PHXI12:THERMODYNAMICS

371241 Unit mass of a liquid with volume \(V_{1}\) is completely changed into a gas of volume \(V_{2}\) at a constant external pressure \(P\) and temperature \(T\). If the latent heat of evaporation for the given mass is \(L\), then the increase in the internal energy of the system is

1 \({\rm{Zero}}\)
2 \(P\left(V_{2}-V_{1}\right)\)
3 \(L-P\left(V_{2}-V_{1}\right)\)
4 \(L\)
PHXI12:THERMODYNAMICS

371242 A cubical box containing a gas is moving with some velocity. If it is suddenly stopped, then the internal energy of gas

1 Decreases
2 Increases
3 Remains constant
4 May increases or decrease depending on the time interval during which box comes to rest
PHXI12:THERMODYNAMICS

371243 Assertion :
The internal energy of a real gas is function of both temperature and volume.
Reason :
Internal kinetic energy depends on temperature and internal potential energy depends on volume.

1 Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXI12:THERMODYNAMICS

371244 The amount of heat energy required to raise the temperature of \(1\;g\) of Helium at NTP, from \({T_1}\;K\) to \({T_2}\;K\) is

1 \(\frac{3}{8}\;{N_a}{k_B}\left( {{T_2} - {T_1}} \right)\)
2 \(\frac{3}{2}\;{N_a}{k_B}\left( {{T_2} - {T_1}} \right)\)
3 \(\frac{3}{4}\;{N_a}{k_B}\left( {{T_2} - {T_1}} \right)\)
4 \(\frac{3}{4}\;{N_a}{k_B}\left( {\frac{{{T_2}}}{{\;{T_1}}}} \right)\)
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PHXI12:THERMODYNAMICS

371241 Unit mass of a liquid with volume \(V_{1}\) is completely changed into a gas of volume \(V_{2}\) at a constant external pressure \(P\) and temperature \(T\). If the latent heat of evaporation for the given mass is \(L\), then the increase in the internal energy of the system is

1 \({\rm{Zero}}\)
2 \(P\left(V_{2}-V_{1}\right)\)
3 \(L-P\left(V_{2}-V_{1}\right)\)
4 \(L\)
PHXI12:THERMODYNAMICS

371242 A cubical box containing a gas is moving with some velocity. If it is suddenly stopped, then the internal energy of gas

1 Decreases
2 Increases
3 Remains constant
4 May increases or decrease depending on the time interval during which box comes to rest
PHXI12:THERMODYNAMICS

371243 Assertion :
The internal energy of a real gas is function of both temperature and volume.
Reason :
Internal kinetic energy depends on temperature and internal potential energy depends on volume.

1 Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXI12:THERMODYNAMICS

371244 The amount of heat energy required to raise the temperature of \(1\;g\) of Helium at NTP, from \({T_1}\;K\) to \({T_2}\;K\) is

1 \(\frac{3}{8}\;{N_a}{k_B}\left( {{T_2} - {T_1}} \right)\)
2 \(\frac{3}{2}\;{N_a}{k_B}\left( {{T_2} - {T_1}} \right)\)
3 \(\frac{3}{4}\;{N_a}{k_B}\left( {{T_2} - {T_1}} \right)\)
4 \(\frac{3}{4}\;{N_a}{k_B}\left( {\frac{{{T_2}}}{{\;{T_1}}}} \right)\)