JEE Mains · Chemistry · STD 11 - 5. Thermodynamics and thermochemistry
Which of the following relations are correct? \((A)\) \(\Delta U = q + p \Delta V\) \((B)\) \(\Delta G =\Delta H - T \Delta S\) \((C)\) \(\Delta S =\frac{ q _{ rev }}{ T }\) \((D)\) \(\Delta H =\Delta U -\Delta nRT\) Choose the most appropriate answer from the options given below :
- A \(C\) and \(D\) only
- B \(B\) and \(C\) only
- C \(A\) and \(B\) only
- D \(B\) and \(D\) only
Answer & Solution
Correct Answer
(B) \(B\) and \(C\) only
Step-by-step Solution
Detailed explanation
Only \((B)\) and \((C)\) are correct. \((B)\) \(G = H - TS\) At constant \(T\) \(\Delta G =\Delta H - T \Delta S\) (A) First law is given by \(\Delta U = Q + W\) If we apply constant \(P\) and reversible work \(\Delta U = Q - P \Delta V\) (C)By definition of entropy change…
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