A gas stream contains $30$mol$\%$ sulphur dloxide, $11$mol$\%$ oxygen and $59$mol$\%$ nitrogen. Caleulate 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 $502(9)=-297000$ k$/$kmol

Mean molar heat capacilies of gases between $25$ oC and $T$ oC at $1$ atm $($Cp$=$kN$/$kmol$.$K$)$

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