Question

The enthalpy of combustion of S (rhombic) is − 297 kJ mo1^-1. Calculate the amount of sulphur required to produce 29. 74 kJ of heat.

Answer 1

Given: Δ_c H of sulphur = − 297 kJ mo1^-1

\[\ce{S_{(s)} + O_{2(9)} ->SO_{2(9)}}\]

32 + 32 = 64 g

For 64 g = − 297 kJ mo1^-1

For 6.4 g = − 297 kJ mo1^-1

6.4 g of sulphur is required.