Enthalpy of combustion of carbon to `CO_(2)` is `-393.5 kJ mol^(-1)`. Calculate the heat released upon formation of `35.2 g` of `CO_(2)` from carbon and dioxygen gas.

Explanation

`C(s) + O_(2)(g) to CO_(2)(g)`
`DeltaH = - 393.5 kJ mol^(-1)`
Heat released for the formation of 44g (1 mol) of `CO_(2) = 393.5 kJ`
Heat released for the formation of 35.2 g of `CO_(2)`
` = (393.5 xx 35.2)/(44) = 314.8kJ`.