Question

The following data were obtained during the first order thermal decomposition of a gas A at constant volume

\(A(g) \rightarrow 2B(g) +C(g)\)

S.No	Time/s	Total pressure/(atm)
1.	0	0.1
2.	115	0.28

The rate constant of the reaction is______\(\times 10 ^{-2}s^{-1}\) (nearest integer)

Answer 1

Correct answer is : 2

0.1 + 2x = 0.28 

2x = 0.18 

x = 0.09

\(K = \frac {1}{115}ln \frac {0.1}{0.1 - 0 . 09}\)

\(= 0.0200\,sec ^{-1}\)

\(= 2 \times 10 ^{-2}sec^{-1}\)