$T_{pc}^{\text{'}}=T_{pc}-80y_{C{O}_2}+130y_{H_{2}S}-250y_{N_2}$

$p_{pc}^{\text{'}}=p_{pc}+440y_{C{O}_2}+600y_{H_{2}S}-170y_{N_2}$

where $,T_{pc}^{\text{'}}=$ the adjusted pseudo$-$critical temperature, $R$

$T_{pc}=$ the unadjusted pseudo$-$critical temperature, $R$

$y_{C{O}_2}=$ mole fraction of $C{O}_2$

$y_{H_{2}S}=$ mole fraction of $H_{2}S$ in the gas mixture

$y_{N_2}^2=$ mole fraction of Nitrogen

$p_{pc}^{\text{'}2}=$ the adjusted pseudo$-$critical pressure, psia