Solve any ONE from these two. step by step answer please only hand written accepted

Q3 The excess enthalpy ( heat of mixing ) for a liquid mixtures 1 and 2 at fixed T and P is expressed as HE = X]X2( 25x1+ 35x2) where H is in J/mol . Determine the expression for : HE and HE in terms of xj. OR For a binary mixture A and B the activity coefficients are related as Inyi= Ax2 and Iny2= Ax? The vapor pressure of A and B at 355k are 120.96kpa and 80.97 kpa resp. Does an azeotrope exist at 353K. if so what is the azeotropic pressure and composition for A=0.6