Thermodynamics and Thermochemistry - Result Question 32
32. $2$ moles of an ideal gas expanded isothermally and reversibly from $1 $ $L$ to $10$ $ L$ at $300$ $ K$. What is the enthalpy change?
(a) $4.98 $ $kJ$
(b) $11.47 $ $kJ$
(c) $-11.47 $ $kJ$
(d) $0 $ $kJ$
(2004, 1M)
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Answer:
Correct Answer: 32. (d)
Solution:
In case of reversible thermodynamic process,
$\Delta H=n C _p \Delta T$
$\therefore$ Process is isothermal, $\Delta T=0 \Rightarrow \Delta H=0$
BETA
