0.5 For a binary mixture of ethanol (1) and cyclohexane (2), the following heat of mixing data are reported by Lien et al. (2004) at 348.15K : (a) Fit the data to an equation of the form Hmix=x1x2i=15A1(x1x2)i1 and show that A1=4925A2=326.86A3=549.75A4=2643As=3608 (b) Use Eq. (7.2-18) and show that the partial molar excess enthalpy of components 1 and 2 is given in the form H1N=x22i=15Ai(x1x2)i1+2x1x22i=14iAi+1(x1x2)i1H2Nn=x12i=15Ai(x1x2)i12x12x2i=14iAi+1(x1x2)i1 (c) Evaluate H1x and H2 when xy=0.55. (d) Show that H1i=i=15(1)i1AiandH2,=i=15Ai and cvaluate 1,ne and H2r,, (Answer: (c) H1ix=877.4J/mol,H2x=1614J/mol, (d) H1x=10.953J/mol, H2,=5014J/mol) 1~1=~mixx2(x2~mix)T,Ptn2