AP EAMCET · PHYSICS · Thermodynamics
An ideal gas expands isothermally from volume \(V_1\) to volume \(V_2\). It is then compressed to the original volume \(V_1\) adiabatically. If \(p_1, p_2\) and \(W\) represent the initial pressure, final pressure and the net work done by the gas respectively during the entire process, then
- A \(p_1>p_2, W=0\)
- B \(p_1>p_2, W>0\)
- C \(p_2>p_1, W>0\)
- D \(p_2>p_1, W < 0\)
Answer & Solution
Correct Answer
(D) \(p_2>p_1, W < 0\)
Step-by-step Solution
Detailed explanation
From graph it is clear that, \(p_2>p_1\). Since, area under adiabatic process (BCED) is greater than that of isothermal process ( \(A B D E)\). Therefore, net work done \(\because \quad W_A>W_1\) \(\Rightarrow \quad W < 0\) Hence option (d) is correct.
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