Chemical Kinetics and Nuclear ChemistryMedium
Question
At 370 K a gaseous reaction X → 2Y + Z is found to be first order. Starting the reaction from pure X the total pressure is observed 156 mm Hg after 15 minutes. After long time pressure is observed 240 mm Hg when X is completely dissociated. What will be the pressure of X after 15 minutes ?
Options
A.42 mm Hg
B.54 mm Hg
C.36 mm Hg
D.80 mm Hg
Solution
= 0
∵ 2P0 + P0 = 240 mm Hg
∴ P0 = 80 mm Hg
After 15 min P0 + 2P = 156 Hg
P = 38 mm Hg
Pressure of X after 15 min = P0 - P
= 42 mm Hg
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