Q. $H_{2}O(l)$

$H_{2}O(g),\ \mathrm{\Delta}H_{vap} = 10\ kcal\ mol^{- 1}$. If pressure is increased

A) Steam is liquefied
B) b.p. of $H_{2}O$ is elevated
C) Both (a) and (b)
D) None of these
Explanation

(c)
$H_{2}O \rightleftharpoons H_{2}O(g)$. This is endothermic process, taking place with increase in pressure. If pressure is increased, equilibrium is displaced in backward side (Le-Chatelier) hence, steam is liquefied. To boil the liquid again, boiling point increases

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.