Calculate the partial molar excess enthalpy

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Reference no: EM131005804

Problem 1: The table below gives the enthalpy of benzene(1)-heptane(2) solutions at 20 °C 1 bar as a function of the mol fraction of benzene.

a) Calculate and plot the excess enthalpy at 20 °C, 1 bar.

b) Calculate the partial molar excess enthalpy at x1 = 0.2, 20 °C, 1 bar.

c) Calculate the heat that is released or absorbed when 10 mol of benzene is mixed with 40 mol of heptane isothermally at 20 °C, 1 bar.

d) Calculate the temperature change when 10 mol of benzene is mixed with 40 mol of heptane adiabatically, 1 bar., if the initial temperature of the pure components is 20 °C. The heat capacity of the pure liquids are CP 1 = 134 J/mol, CP 2 = 222 J/mol K.

x1	H(J/mol)	x1	H(J/mol)
0	635	0.5	1229.51
0.14	956.91	0.58	1185.85
0.2	1035.06	0.65	1110.76
0.22	1066.37	0.71	1005.74
0.3	1174.31	0.83	688.42
0.33	1184.04	0.88	537.71
0.37	1203.61	1	-50
0.44	1237.33

Reference no: EM131005804

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