The Standard enthalpy of formation of gaseous `H_(2)O` at 298K is `-242 mol^(-1)` . Calculate `DeltaH^(@)"at"373K` given the following values of the molar feat capacities at constant pressure .
Molar heat capcity of `H_(2)O(g)=33.5JK^(-1)mol^(-1)`
molar heat capacity of `H_(2)(g)=28.8JK^(-1)mol^(-1)`
Molar heat capacity of `O_(2)(g)=29.4 JK^(-1)mol^(-1)`
{Assume that the heat capacities are independent of temperature.}
A. `508KJ mol^(-1)`
B. `-242KJ mol^(-1)`
C. `-242.75 KJ mol^(-1)`
D. none of these
