Arun
Last Activity: 5 Years ago
Initial pressure = 500 mm Hg
Total final pressure = 625 mm Hg
# Solution-
Conversion of pressure in reaction occurs as-
Reaction 2ab ---> 2a + b2
Initially 500 0 0
Finally 500-2p 2p p
Total pressure is given by-
625 = 500-2p + 2p + p
p = 125 mm Hg
Therefore,
p(ab) = 500-2×125 = 250 mm Hg
p(a) = 2p = 250 mm Hg
p(b2) = p = 125 mm Hg
Kp = p(a)^2.p(b2) / p(ab)^2
Kp = 250^2 × 125 / 250^2
Kp = 125
Therefore value of Kp = 125.
Regards
Arun (askIITians forum expert)