2CIF(g) + 02(g) → C1,0(g) + F,°(g)

2CIF (g) + 202(g) → C1,0(g) + 3F,0(g)

2F, (g) + 02(g) → 2F,°(g)

ДН°

rn = 167.4 kJ/mol

ДН°rn = 341.4 kJ/mol

ДН°

rxn

= -43.4 kJ/mol

At the same temperature, use Hess's law to calculate AHn for the reaction:

CIF(g) + F,(g) → CIF (g)