An ideal gas is made to undergo a cycle depicted by the $$(P-V)$$ diagram alongside. If the curved line from $$A$$ to $$B$$ is adiabatic, then:

 1 the efficiency of this cycle is given by unity as no heat is released during the cycle. 2 heat is absorbed in the upper part of the straight-line path and released in the lower. 3 if $$T_1$$ and $$T_2$$ are the maximum and minimum temperatures reached during the cycle, then the efficiency is given by, $$1-\frac{T_2}{T_1}.$$ 4 the cycle can only be carried out in the reverse direction as shown in the figure.
Subtopic: Â Cyclic Process |
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The Carnot cycle (reversible) of gas is represented by a pressure-volume curve as shown. Consider the following statements:

 I. Area ABCD = Work done on the gas II. Area ABCD = Net heat absorbed III. Change in the internal energy in cycle = 0

Which of the statement(s) given above is/are correct?

 1 I only 2 II only 3 II and III 4 I, II and III
Subtopic: Â Cyclic Process |
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One mole of a diatomic ideal gas undergoes a cyclic process $$ABC$$ as shown in the figure. The process $$BC$$ is adiabatic. The temperatures at $$A,$$ $$B,$$ and $$C$$ are $$400$$ K, $$800$$ K, and $$600$$ K respectively. Choose the correct statement.

 1 the change in internal energy in the process $$BC$$ is $$-500R.$$ 2 the change in internal energy in the whole cyclic process is $$250R.$$ 3 the change in internal energy in the process $$CA$$ is $$700R.$$ 4 the change in internal energy in the process $$AB$$ is $$-350R.$$
Subtopic: Â Cyclic Process |
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One mole of an ideal gas is taken through a cyclic process as shown in the $$(V-T)$$ diagram. Which of the following statements is correct?

 1 The magnitude of the work done by the gas is $$RT_{0}\ln 2$$. 2 Work done by the gas is $$V_{0}T_{0}.$$ 3 Net work done by the gas is zero. 4 Work done by the gas is $$2RT_{0}\ln2$$.
Subtopic: Â Cyclic Process |
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