The dependence of enthalpy on temperature (in Kelvin) of many chemicals are given by the relationship:
H=AT+BT^2-C/T
For hydrogen gas, the constants yielding a final value in units of J/mol are,
A= 27.28, B=0.00163, C=5×104
Applicable in the range 298-3000 K. Calculate its molar heat capacity at constant pressure at 500 K.