A gas stream contains $10$mol$\%$ sulphur dioxide, $11$mol$\%$ oxygen and $79$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 $S{O}_2(g)=-297000k\frac{J}{k}$mol

Mean molar heat capacities of gases at $1$atm$(C_p=k\frac{J}{k}$mol.$K)$