The normal boiling point of liquid butanol is 391 K. Assuming that its molar heat of vaporization is constant at 45.9 kJ/mol, the boiling point of C4H9OH when the external pressure is 0.633 atm is ______ KFind the value of K

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A: ΔH0 = -91.8 KJ/mol ΔS0 = -197 J/mol.K        = -0.197 KJ/mol.K T= 25.0 oC = (25.0+273) K = 298 K

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