Question:
Consider a first order gas phase decomposition reaction given below :
A(g) → B(g) + C(g)
The initial pressure of the system before decomposition of A was pi. After lapse of time ‘t’, total pressure of the system increased by x units and became ‘pt The rate constant k for the reaction is given as _________.
(i) k = 2.303/t log Pi/Pi-x
(ii) ) k = 2.303/t log Pi/2Pi-Pt
(iii) ) k = 2.303/t log Pi/2Pi-2Pt
(iv) ) k = 2.303/t log Pi/Pi+x
Solution:
Option (ii) k = 2.303/t log Pi/2Pi-Pt is the answer.