The molar heat capacity of ethane is represented in the temperature range 298 K to 400 K by the empirical expression C P,m /(J/molK) = 14.73 + 0.1272 (T/K). The
corresponding expressions for C(s) and H 2 (g) are given below. Calculate the standard enthalpy of formation of ethane at 350 K from its value at 298 K (Δ f H (298 K) = - 84.7 kJ/mol).