Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Hydrogen peroxide (H 2 O 2 ) decomposes according to the equation
2H 2 O 2 
2H 2 O (I) + O 2 (g)
From the following data at 25°C calculate the value of K p at 400 K for the above reaction, 
H° = -196 . 0 KJ 
S° = 125.65J/K.
[Given: 10 0.15 = 1.41]
Text Solution
Verified by ExpertsThe correct answer is:
A
0.14 x 10 32
G° = + 
H° - T 
S°
= -196000-400(125-65)
= -196000 - 50260
= -246260J = -2. 303 x 8 .314 x 400 log K p
K p = Antilog (32.15)
= 0.14 x 10 32
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