a) If ∆rU = 100 kJ mol–1 for A(s) → 2B(g) at 120.3 K, what is the value of ∆rH in kJ mol–1 for this reaction at the same temperature?

b)The standard molar enthalpy of combustion of ethylene gas (C2H2(g)) at 298 K is ∆cH– ο = –1300 kJ mol–1 . For liquid benzene, (C6H6(l)), ∆cH = –3270 kJ mol–1 at 298 K. What is ∆rH in kJ mol–1 for the reaction 3C2H2(g) → C6H6(l) at 298 K?

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a ArHArUAngRT X where ArH Aru Ang R T MCY OF SE change in enthalpy of react... View the full answer