Chemical Thermodynamics Question 18

Question: Which of the following is true for the reaction $ H_2O(l) $ ⇌ $ H_2O(g) $ at $ 100^{o}C $ and 1 atmosphere [KCET 1991; AIIMS 1996]

Options:

A) $ \Delta E=0 $

B) $ \Delta H=0 $

C) $ \Delta H=\Delta E $

D) $ \Delta H=T\Delta S $

Show Answer

Answer:

Correct Answer: D

Solution:

At equilibrium, $ \Delta G $ = 0
Hence 0 = $ \Delta H-T\Delta S $ or $ \Delta H=T\Delta S $ .



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