\( \frac{T_{1}}{T_{2}}=\left(\frac{p_{1}}{p_{2}}\right)^{\frac{k-1}{k}} \)
\( \frac{k-1}{k}*ln(\frac{p_{1}}{p_{2}})=ln(\frac{T_{1}}{T_{2}})\)
\( \frac{k-1}{k}=\frac{\ln \left(\frac{T_{1}}{T_{2}}\right)}{\ln \left(\frac{p_{1}}{p_{2}}\right)} \)
\( 1-\frac{1}{k}=\frac{\ln \left(\frac{T_{1}}{T_{2}}\right)}{\ln \left(\frac{p_{1}}{p_{2}}\right)} \)
\( \frac{1}{k}=1-\frac{\ln \left(\frac{T_{1}}{T_{2}}\right)}{\ln \left(\frac{p_{1}}{p_{2}}\right)} \)
\( \frac{1}{k}=\frac{\ln \left(\frac{p_{1}}{p_{2}}\right)-\ln \left(\frac{T_{1}}{T_{2}}\right)}{\ln \left(\frac{p_{1}}{p_{2}}\right)} \)
\( k=\frac{\ln \left(\frac{p_{1}}{p_{2}}\right)}{\ln \left(\frac{p_{1}}{p_{2}}\right)-\ln \left(\frac{T_{1}}{T_{2}}\right)} \)