$\begin{array}{1 1} -\Delta T_t =K_tm\;with \;K_t =M_1RT_t^{+2}/\Delta H_m \\ -\Delta T_t =K_tm\;with \;K_t =RT_t^{+2}/M_1 \Delta H_m \\ -\Delta T_t =K_tm\;with \;K_t =M_1T_t^{+2}/R \Delta H_m \\ -\Delta T_t =K_tm\;with \;K_t =\Delta H_m/M_1RT_t^{+2} \end{array} $