18. Calculate the AH of reaction for CIF(g)F2(g)> CIF3(g) given the following data: 1) 2CIF(g)O2(g) -> Cl20(g) +F20(g) ΔΗ -167.4 kJ 2) 2CIF3(g)202(g)Cl20(g) +3 F2O(g) ΔΗ-341.4 kJ 3) 2F2(g)O2(g)->2F20(g) AH -43.4 kJ a. -217 kJ b. 465 kJ c. -174 kJ d. 233 kJ е. -109 kJ

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