148099
$\mathbf{d U}+\delta \mathbf{W}=\mathbf{0}$ is valid for
1 adiabatic process
2 isothermal process
3 isobaric process
4 isochoric process
Explanation:
A For adiabatic process, $\Delta \mathrm{Q}=0$ According to the first law of thermodynamics, $\mathrm{dQ}=\mathrm{dU}+\delta \mathrm{W}$ $\mathrm{dU}+\delta \mathrm{W}=0$
CG PET- 2009
Thermodynamics
148107
If temperature is increased by $1 \mathrm{~K}$ at constant volume, then work done on the gas is :
1 $\frac{5}{2} R$
2 $\frac{3}{2} \mathrm{R}$
3 Zero
4 $\frac{1}{2} \mathrm{R}$
Explanation:
C Given that, at constant volume (V) = const. $\mathrm{dV}=0$ $\because$ Work done on a gas $(\mathrm{W})=\mathrm{PdV}$ $\mathrm{W}=0$
JCECE-2006
Thermodynamics
148109
A box (thermally insulated) has two chambers separated by a membrane. One of volume $V$ contains an ideal gas at temperature $T$. The other of volume $\frac{V}{2}$ is evacuated. If the membrane breaks down, the gas temperature will be
1 $2 \mathrm{~T} / 2$
2 $3 \mathrm{~T} / 2$
3 $\mathrm{T}$
4 Data is incomplete
Explanation:
C Isolated system that does not allow the transfer of either mass or energy to or from its surrounding. $\mathrm{dQ}=0$ Hence, container is thermally insulated $d Q=0$ then $\mathrm{dU}$ $=0$ or no change in temperature of the gas. $\mathrm{T}=\text { constant }$
COMEDK-2018
Thermodynamics
148111
Which of the following relations is correct?
1 $\mathrm{E}=\mathrm{mc}$
2 $\mathrm{E}=\mathrm{mc}^{2}$
3 $\mathrm{E}=2 \mathrm{mc}^{2}$
4 $\mathrm{E}=\frac{\mathrm{mc}^{2}}{4}$
Explanation:
B According to Einstein, energy and mass are related by the relation $\mathrm{E}=\mathrm{mc}^{2}$ Where, $c$ is the speed of light in vacuum.
148099
$\mathbf{d U}+\delta \mathbf{W}=\mathbf{0}$ is valid for
1 adiabatic process
2 isothermal process
3 isobaric process
4 isochoric process
Explanation:
A For adiabatic process, $\Delta \mathrm{Q}=0$ According to the first law of thermodynamics, $\mathrm{dQ}=\mathrm{dU}+\delta \mathrm{W}$ $\mathrm{dU}+\delta \mathrm{W}=0$
CG PET- 2009
Thermodynamics
148107
If temperature is increased by $1 \mathrm{~K}$ at constant volume, then work done on the gas is :
1 $\frac{5}{2} R$
2 $\frac{3}{2} \mathrm{R}$
3 Zero
4 $\frac{1}{2} \mathrm{R}$
Explanation:
C Given that, at constant volume (V) = const. $\mathrm{dV}=0$ $\because$ Work done on a gas $(\mathrm{W})=\mathrm{PdV}$ $\mathrm{W}=0$
JCECE-2006
Thermodynamics
148109
A box (thermally insulated) has two chambers separated by a membrane. One of volume $V$ contains an ideal gas at temperature $T$. The other of volume $\frac{V}{2}$ is evacuated. If the membrane breaks down, the gas temperature will be
1 $2 \mathrm{~T} / 2$
2 $3 \mathrm{~T} / 2$
3 $\mathrm{T}$
4 Data is incomplete
Explanation:
C Isolated system that does not allow the transfer of either mass or energy to or from its surrounding. $\mathrm{dQ}=0$ Hence, container is thermally insulated $d Q=0$ then $\mathrm{dU}$ $=0$ or no change in temperature of the gas. $\mathrm{T}=\text { constant }$
COMEDK-2018
Thermodynamics
148111
Which of the following relations is correct?
1 $\mathrm{E}=\mathrm{mc}$
2 $\mathrm{E}=\mathrm{mc}^{2}$
3 $\mathrm{E}=2 \mathrm{mc}^{2}$
4 $\mathrm{E}=\frac{\mathrm{mc}^{2}}{4}$
Explanation:
B According to Einstein, energy and mass are related by the relation $\mathrm{E}=\mathrm{mc}^{2}$ Where, $c$ is the speed of light in vacuum.
148099
$\mathbf{d U}+\delta \mathbf{W}=\mathbf{0}$ is valid for
1 adiabatic process
2 isothermal process
3 isobaric process
4 isochoric process
Explanation:
A For adiabatic process, $\Delta \mathrm{Q}=0$ According to the first law of thermodynamics, $\mathrm{dQ}=\mathrm{dU}+\delta \mathrm{W}$ $\mathrm{dU}+\delta \mathrm{W}=0$
CG PET- 2009
Thermodynamics
148107
If temperature is increased by $1 \mathrm{~K}$ at constant volume, then work done on the gas is :
1 $\frac{5}{2} R$
2 $\frac{3}{2} \mathrm{R}$
3 Zero
4 $\frac{1}{2} \mathrm{R}$
Explanation:
C Given that, at constant volume (V) = const. $\mathrm{dV}=0$ $\because$ Work done on a gas $(\mathrm{W})=\mathrm{PdV}$ $\mathrm{W}=0$
JCECE-2006
Thermodynamics
148109
A box (thermally insulated) has two chambers separated by a membrane. One of volume $V$ contains an ideal gas at temperature $T$. The other of volume $\frac{V}{2}$ is evacuated. If the membrane breaks down, the gas temperature will be
1 $2 \mathrm{~T} / 2$
2 $3 \mathrm{~T} / 2$
3 $\mathrm{T}$
4 Data is incomplete
Explanation:
C Isolated system that does not allow the transfer of either mass or energy to or from its surrounding. $\mathrm{dQ}=0$ Hence, container is thermally insulated $d Q=0$ then $\mathrm{dU}$ $=0$ or no change in temperature of the gas. $\mathrm{T}=\text { constant }$
COMEDK-2018
Thermodynamics
148111
Which of the following relations is correct?
1 $\mathrm{E}=\mathrm{mc}$
2 $\mathrm{E}=\mathrm{mc}^{2}$
3 $\mathrm{E}=2 \mathrm{mc}^{2}$
4 $\mathrm{E}=\frac{\mathrm{mc}^{2}}{4}$
Explanation:
B According to Einstein, energy and mass are related by the relation $\mathrm{E}=\mathrm{mc}^{2}$ Where, $c$ is the speed of light in vacuum.
148099
$\mathbf{d U}+\delta \mathbf{W}=\mathbf{0}$ is valid for
1 adiabatic process
2 isothermal process
3 isobaric process
4 isochoric process
Explanation:
A For adiabatic process, $\Delta \mathrm{Q}=0$ According to the first law of thermodynamics, $\mathrm{dQ}=\mathrm{dU}+\delta \mathrm{W}$ $\mathrm{dU}+\delta \mathrm{W}=0$
CG PET- 2009
Thermodynamics
148107
If temperature is increased by $1 \mathrm{~K}$ at constant volume, then work done on the gas is :
1 $\frac{5}{2} R$
2 $\frac{3}{2} \mathrm{R}$
3 Zero
4 $\frac{1}{2} \mathrm{R}$
Explanation:
C Given that, at constant volume (V) = const. $\mathrm{dV}=0$ $\because$ Work done on a gas $(\mathrm{W})=\mathrm{PdV}$ $\mathrm{W}=0$
JCECE-2006
Thermodynamics
148109
A box (thermally insulated) has two chambers separated by a membrane. One of volume $V$ contains an ideal gas at temperature $T$. The other of volume $\frac{V}{2}$ is evacuated. If the membrane breaks down, the gas temperature will be
1 $2 \mathrm{~T} / 2$
2 $3 \mathrm{~T} / 2$
3 $\mathrm{T}$
4 Data is incomplete
Explanation:
C Isolated system that does not allow the transfer of either mass or energy to or from its surrounding. $\mathrm{dQ}=0$ Hence, container is thermally insulated $d Q=0$ then $\mathrm{dU}$ $=0$ or no change in temperature of the gas. $\mathrm{T}=\text { constant }$
COMEDK-2018
Thermodynamics
148111
Which of the following relations is correct?
1 $\mathrm{E}=\mathrm{mc}$
2 $\mathrm{E}=\mathrm{mc}^{2}$
3 $\mathrm{E}=2 \mathrm{mc}^{2}$
4 $\mathrm{E}=\frac{\mathrm{mc}^{2}}{4}$
Explanation:
B According to Einstein, energy and mass are related by the relation $\mathrm{E}=\mathrm{mc}^{2}$ Where, $c$ is the speed of light in vacuum.
