COMEDK · Chemistry · 6. Thermodynamics (C)
When the expansion of a gas occurs in vaccum and at constant volume, then
- A \(\Delta U=q V\)
- B \(\Delta U=q p\)
- C \(\Delta H=q V\)
- D \(\Delta H=q p\)
Answer & Solution
Correct Answer
(A) \(\Delta U=q V\)
Step-by-step Solution
Detailed explanation
As we know that, \[ \Delta U=q-p_{\text {ext }} \Delta V \] Now, if a process of expansion of a gas occurs in vaccum and at constant volume, then \[ \Delta U=q V \quad\left(\Delta V=0, p_{\text {ext }}=0\right) \]
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