Thermodynamics And Thermochemistry Result Question 10
10. $\Delta H_{\text {vap }}=30$ $ \mathrm{~kJ} / \mathrm{mol}$ and $\Delta S_{\text {vap }}=75 $ $\mathrm{Jmol}^{-1} \mathrm{~K}^{-1}$. Find the temperature of vapour, at one atmosphere
(2004, 1M)
(a) $400$ K
(b) $350$ K
(c) $298$ K
(d) $250$ K
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Answer:
Correct Answer: 10. ( a )
Solution:
- $T =\frac{H _{\text {vap }}}{S _{\text {vap }}} =\frac{30,000}{75} =400 \mathrm{~K}$
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