Estimate the latent heat of vaporisation of acetic anhydride, C4H6O3, at its boiling point, 139.6C (412.7 K), and at 200C (473 K). Antoine constants  A = 16.3982 B =3287.56 C = -75.11 Experimental value at the boiling point 41,242 kJ/kmol

For substance A, it is known that the vapor pressure at 300K is 100kPa. It is also known that the boiling point temperature is 340K at 150 kPa. Other given information about substance A: Cpl= 200 J/mol.K and Cpv = 180 J/mol.K c) Using the correlation developed in part a), determine the latent heat of vaporization of substance A in kJ/kmol d) 2 mol of substance A goes through a process where its temperature changes from 400K to 300K at constant pressure 150kPa. i) What phase is present initially? ii) What phase is present at the final state? iii) Determine the total amount of energy transferred (in kJ) through the process and state whether the energy is transferred to or from the substance.