Given the following data, calculate the enthalpy change for the reaction

Question

S(s)+ O2(g)->SO2(g)

S(s)+(3/2)O2(g)->SO3(g) H=-395.2 kJ
2SO2(g)+ O2(g)->2SO3(g) H=-198.2 kJ

Answer 1

deltaHrxn = (n*DH products) - (n*DH reactants)
DH = delta H.