The equation of the first law of thermodynamics for isochoric process is
Q.1 (iii) The equation of the first law of thermodynamics for isochoric process is
A. \(Q=\Delta U\)
B. \(Q=0\)
C. \(Q=\Delta U+W\)
D. \(Q=\Delta U-W\)
1 answer
Best answer
Answer: A. \(Q=\Delta U\)
Answer: (a) \(Q=\Delta U\)
First law: \(Q=\Delta U+W\). In an isochoric process the volume is constant, so \(W=P\,\Delta V=0\). Hence \(Q=\Delta U\): all the heat supplied changes the internal energy.
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· 28 Oct 2026
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