Given that the density of ice and liquid water at STP (water's normal melting point) are 0.9168 g/cm³, respectively, and that delta _fus H = 6.009 kJ/mol, calculate the slope of the liquid-solid coexistence curve in water's phase diagram, at STP. b) List two standard approximations used in integrating the Clapeyron equation to find the equilibrium pressure as a function of temperature, for the case of coexistence between two condensed phases such as ice and liquid water.