Second Law of Thermodynamics and Carnot Engine
PHXI12:THERMODYNAMICS

371393 The efficiency of a Carnot engine which operates between the two temperatures \({T_1} = 500\;K\) and \({T_2} = 300\;K\) is

1 \(25\,\% \)
2 \(40\,\% \)
3 \(50\,\% \)
4 \(75\,\% \)
PHXI12:THERMODYNAMICS

371394 A carnot engine has efficiency \(25 \%\). It operates between reservoirs of constant temperatures with temperature difference of \(80\;K\). What is the temperature of the cold reservoir?

1 \( - 29^\circ C\)
2 \( - 31^\circ C\)
3 \( - 27^\circ C\)
4 \( - 33^\circ C\)
PHXI12:THERMODYNAMICS

371395 A carnot engine absorbs \(1000\;J\) of heat energy from a reservoir at \(127^\circ C\) and rejects \(600\;J\) of heat energy during each cycle. The efficiency of engine and temperature of sink will be:

1 \(20\,\% \) and \( - 43^\circ C\)
2 \(40\,\% \) and \( - 33^\circ C\)
3 \(50\,\% \) and \( - 20^\circ C\)
4 \(70\,\% \) and \( - 10^\circ C\)
PHXI12:THERMODYNAMICS

371396 A carnot engine, having efficiency of \(\eta=\dfrac{1}{10}\) as heat engine, is used as a refrigerator. If the work done on the system is \(10\;J\), the amount of energy absorbed from the reservoir at lower temperature is

1 \(90\;J\)
2 \(99\;J\)
3 \(100\;J\)
4 \(1\;J\)
PHXI12:THERMODYNAMICS

371393 The efficiency of a Carnot engine which operates between the two temperatures \({T_1} = 500\;K\) and \({T_2} = 300\;K\) is

1 \(25\,\% \)
2 \(40\,\% \)
3 \(50\,\% \)
4 \(75\,\% \)
PHXI12:THERMODYNAMICS

371394 A carnot engine has efficiency \(25 \%\). It operates between reservoirs of constant temperatures with temperature difference of \(80\;K\). What is the temperature of the cold reservoir?

1 \( - 29^\circ C\)
2 \( - 31^\circ C\)
3 \( - 27^\circ C\)
4 \( - 33^\circ C\)
PHXI12:THERMODYNAMICS

371395 A carnot engine absorbs \(1000\;J\) of heat energy from a reservoir at \(127^\circ C\) and rejects \(600\;J\) of heat energy during each cycle. The efficiency of engine and temperature of sink will be:

1 \(20\,\% \) and \( - 43^\circ C\)
2 \(40\,\% \) and \( - 33^\circ C\)
3 \(50\,\% \) and \( - 20^\circ C\)
4 \(70\,\% \) and \( - 10^\circ C\)
PHXI12:THERMODYNAMICS

371396 A carnot engine, having efficiency of \(\eta=\dfrac{1}{10}\) as heat engine, is used as a refrigerator. If the work done on the system is \(10\;J\), the amount of energy absorbed from the reservoir at lower temperature is

1 \(90\;J\)
2 \(99\;J\)
3 \(100\;J\)
4 \(1\;J\)
PHXI12:THERMODYNAMICS

371393 The efficiency of a Carnot engine which operates between the two temperatures \({T_1} = 500\;K\) and \({T_2} = 300\;K\) is

1 \(25\,\% \)
2 \(40\,\% \)
3 \(50\,\% \)
4 \(75\,\% \)
PHXI12:THERMODYNAMICS

371394 A carnot engine has efficiency \(25 \%\). It operates between reservoirs of constant temperatures with temperature difference of \(80\;K\). What is the temperature of the cold reservoir?

1 \( - 29^\circ C\)
2 \( - 31^\circ C\)
3 \( - 27^\circ C\)
4 \( - 33^\circ C\)
PHXI12:THERMODYNAMICS

371395 A carnot engine absorbs \(1000\;J\) of heat energy from a reservoir at \(127^\circ C\) and rejects \(600\;J\) of heat energy during each cycle. The efficiency of engine and temperature of sink will be:

1 \(20\,\% \) and \( - 43^\circ C\)
2 \(40\,\% \) and \( - 33^\circ C\)
3 \(50\,\% \) and \( - 20^\circ C\)
4 \(70\,\% \) and \( - 10^\circ C\)
PHXI12:THERMODYNAMICS

371396 A carnot engine, having efficiency of \(\eta=\dfrac{1}{10}\) as heat engine, is used as a refrigerator. If the work done on the system is \(10\;J\), the amount of energy absorbed from the reservoir at lower temperature is

1 \(90\;J\)
2 \(99\;J\)
3 \(100\;J\)
4 \(1\;J\)
PHXI12:THERMODYNAMICS

371393 The efficiency of a Carnot engine which operates between the two temperatures \({T_1} = 500\;K\) and \({T_2} = 300\;K\) is

1 \(25\,\% \)
2 \(40\,\% \)
3 \(50\,\% \)
4 \(75\,\% \)
PHXI12:THERMODYNAMICS

371394 A carnot engine has efficiency \(25 \%\). It operates between reservoirs of constant temperatures with temperature difference of \(80\;K\). What is the temperature of the cold reservoir?

1 \( - 29^\circ C\)
2 \( - 31^\circ C\)
3 \( - 27^\circ C\)
4 \( - 33^\circ C\)
PHXI12:THERMODYNAMICS

371395 A carnot engine absorbs \(1000\;J\) of heat energy from a reservoir at \(127^\circ C\) and rejects \(600\;J\) of heat energy during each cycle. The efficiency of engine and temperature of sink will be:

1 \(20\,\% \) and \( - 43^\circ C\)
2 \(40\,\% \) and \( - 33^\circ C\)
3 \(50\,\% \) and \( - 20^\circ C\)
4 \(70\,\% \) and \( - 10^\circ C\)
PHXI12:THERMODYNAMICS

371396 A carnot engine, having efficiency of \(\eta=\dfrac{1}{10}\) as heat engine, is used as a refrigerator. If the work done on the system is \(10\;J\), the amount of energy absorbed from the reservoir at lower temperature is

1 \(90\;J\)
2 \(99\;J\)
3 \(100\;J\)
4 \(1\;J\)