A) \[+\,\,7000\,\,J\]
B) \[-\,\,7000\,\,J\]
C) \[+\,\,5000\,\,J\]
D) \[-\,\,5000\,\,J\]
Correct Answer: A
Solution :
\[W=-\,\,600\,J,\] \[Q=+1000\,J,\] In an adiabatic process, Q = 0 \[{{Q}_{1\,-\,2}}={{W}_{1\,-\,2}}+{{U}_{1\,-\,2}}\] \[0=-\,\,6000+{{U}_{1\,-\,2}}\] \[{{U}_{1\,-\,2}}\,\,=\,\,6000\,\,J,\] \[{{U}_{2\,-\,1}}=-\,\,6000\,\,J\] In a non-adiabatic process, \[{{Q}_{2\,-\,1}}={{W}_{2\,-\,1}}+{{U}_{2\,-\,1}}\] \[1000\,\,=\,\,{{W}_{2\,-\,1}}\,-\,\,6000\] \[{{W}_{2\,-\,1}}=+7000\,J\]You need to login to perform this action.
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