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) rarr CO_(2)(g), DeltaH = -393.5kJ mol^(-1)`
` 1 mol = 44g`
Heat released when 44 g `CO_(2)` is formed `= 393.5kJ`
`:. `Heat released when `35.2g CO_(2)` is formed `= ( 393.5)/( 44) xx35.2kJ = 314.8 kJ`