Enthalpy of combustion of C to `CO_2` is -393.5 KJ `mol^-1`. Calcualte the heat released upon formation of 35.2 g of `CO_2` from carbon and exygen gas.

Explanation

`C(s)+O_2(g)rarrCO_2(g) DeltaH=-393.5 kJ mol^--` Heat released in the formation of 1 mol of `CO_2`=393.5 KJ `therefore` Heat released in the formation of 35.2 g `CO_2`=`393.5/44xx35.2=314.8 kJ`
`DeltaH` for the formaiton of 35.2g `CO_2=-314.8kJ`