One handbook lists the sublimation pressure of solid benzene as a function of Kelvin temperature, T, as log P (mmHg) = 9.846 - 2309/T. Another handbook lists the vapor pressure of liquid benzene as a function of Celsius temperature, t, as log P (mmHg) = 6.90565 - 1211.033/(220.790 + t). Use these equations to estimate the normal melting point of benzene, and compare your result with the listed value of 5.5 °C.