$1.5\,\, \times \,\,1{0^{ - 2}}\, = \,\,K\,\, \times \,\,0.5$
$K\,\, = \,\,3\,\, \times \,\,{10^{ - 2}}\,{\min ^{ - 1}}$
${t_{1/2}}\,\, = \,\,\frac{{0.693}}{K}\, = \,\,\frac{{0.693}}{{3\,\, \times \,\,{{10}^{ - 2}}}}\,\, = \,\,23.1\,\,\min .$
$T$ (in, $K$) $- 769$ , $1/T$ (in, $K^{-1}$ ) $- 1.3\times 10^{-3},$
$\log_{10}K - 2.9\,T$ (in, $K$) $- 667$, $1/T$ (in, $K^{-1}) - 1.5\times 10^{-3}$, $\log_{10}\,K - 1.1$