A gas stream contains $20$mol$\%$ sulphur dioxide, $11$mol$\%$ oxygen and $69$mol$\%$ nitrogen. Calculate the enthalpy of $100$kmol of the gas stream at $425C($in GJ$,$ round to two decimal places$)$ by using the normal temperature and pressure as reference.

DATA

Standard heat of formation $SO2(g)=-297000k\frac{J}{k}$mol

Mean molar heat capacities of gases between $25oC$ and $T$@$C$ at $)=(k\frac{J}{k}$mol.$K$

$\backslash$table$[[T{(}^{0}C),N_2,O_2,S{O}_2$