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prerna (anonymous) doubts approved

The enthalpy of formation of NH3(g) as per the following reaction is -46.11 kJ/mol
at 298 K.

N2(g) + 3H2(g) 2 NH3(g)
Calculate the value of enthalpy of formation of NH3(g) at 100 oC. The C*p (J K-1 mol-)

values are given as: N2(g) = 29.12; H2(g) = 28.82; NH3(g) = 35.06. Assume the
given heat capacity values to be temperature independent in the range.