For a first order gas phase reaction: Ag → 2Bg + Cg, P0 be the initial pressure of A and Pt the total pressure at time 't'. Integrated rate equation is:
1
\(k = \frac {2.303}{t} \log \frac {2P0}{3P0-Pt}\)
2
\(k = \frac {2.303}{t} \log \frac {2P0}{2P0-Pt}\)
3
\(k = \frac {2.303}{t} \log \frac {P0}{2P0-Pt}\)
4
\(k = \frac {2.303}{t} \log \frac {P0}{P0-Pt}\)