MCQ
During an isothermal expansion of an ideal gas its
- AInternal energy increases
- BEnthalpy decreases
- ✓Enthalpy remains unaffected
- DEnthalpy reduces to zero
✓
Answer
Correct option: C.
Enthalpy remains unaffected
(c)During isothermal expansion of ideal gas, $\Delta T = 0$
$\Delta H = \Delta E + P\Delta V$$ = \Delta E + nR\Delta T$$ = 0 + 0 = 0$.
$\Delta H = \Delta E + P\Delta V$$ = \Delta E + nR\Delta T$$ = 0 + 0 = 0$.
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