(a) Find the degrees of freedom in a systems consisting of: (i) Thermal decomposition of ammonium chloride as in the following reaction: NH4Cl(s)NH3(g)+HCl(g)(0.5Mark) (ii) Solid sucrose in equilibrium with an aqueous solution of sucrose. ( 0.5 Mark) (iii) Liquid solution of methanol and ethanol in equilibrium with a vapor mixture of methanol and ethanol. (0.5 Mark) Page 2 of 3 (b) Calculate the molar heat of vaporization (in kJ/mol ) of a liquid whose vapor pressure triple when the temperature is raised from 70C to 80C. (1 Mark)