Solid benzene melts at 28.35 °C when the pressure is 85.2 MPa. The molar volumes of solid and liquid benzene at these conditions are 74.25 cm3 mol-1 and 82.55 cm3 mol-1, respectively. High Temperature Materials and Processes 26 (2007) 365-369 a. When the pressure is increased to 128 MPa, benzene is found to melt at 39.85 °C. Calculate the enthalpy and entropy of fusion of the solid. b. Estimate the freezing temperature of benzene at 92.5 MPa

Calculate the vapour pressure of water at 75 °C. Take the enthalpy of vaporization of water as 40.66 kJ/mol and its boiling point as 100 °C. Calculate the change in chemical potential for a substance X with a molar mass of 100 g/mol, a density of 2 g/cm, when the pressure on it is increased by 10 bar at its melting point temperature of 25 °C.

The normal boiling point of cyclohexane is 80.74 °C.At 20.00 °C, the vapour pressure of cyclohexane is 0.1026 atm.What is the vapour pressure of cyclohexane when the temperature is 33.00 °C? ----------------------------------------------------------------------------------- The vapour pressure at the normal boiling point is known, by definition, to be 1 atm.You therefore can write three different equations of the sort:lnPvap = [(−∆H)/(RT)] + Ci.e. for each of the three pairs of P and T.You can take the difference between the equations for the cases (Pb, Tb) and (P1, T1).This could be used to solve for [(−∆H)/(R)].Analogously you can take the difference between the equations for the cases (Pb, Tb) and(P2, T2).Since both differances must give rise to the same value for [(−∆H)/(R)], you can equate them to write an equation which allows you to calculate P2 in terms of Pb, Tb, P1, T1 and T2

From the following vapor pressure data for ethyl amine, an estimate of the molar heat of vaporization of C₂H5NH₂ is | kJ/mol. P, mm Hg T, K 40.0 233 100. 248