First slide

Enthalpy of Phase transition

Question

Statement I: The enthalpy of formation of H₂O_(l) is greater than that of H₂O_(g).
Statement II: Enthalpy change is negative for the condensation reaction H₂O_(g) → H₂O_(l).

Easy

A

Statement I and Statement II are true.
B

Statement I is true and statement II is false.
C

Statement I is false and Statement II is true.
D

Statement I and Statement II are false.

Solution

(I) some amount of energy is used in the vapourization H₂O_(l)
(II) Molecules of gas are having high Kinetic energy, high disorder and weak attractive forces
on condensation , K.E decreases , randomness decreases , attractive forces becomes stronger energy is released
$\therefore\;\Delta H=-ve$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App