4 PCl_3 (g) rightarrow P_4 (s) + 6 Cl_2 (g) Delta H degree _rxn = + 1207 kJ A) 1.68 times 10^3 kJ B) 6.72 times 10^3 kJ C) 5.95 times 10^3 kJ D) 2.31 times 10^3 kJ E) 4.33 times 10^3 kJ Which of the following statements is TRUE? A) Delta H degree _rxn can be determined using constant pressure calorimetry. B) State functions do not depend on the path taken to arrive at a particular sta C) Energy is neither created nor destroyed, excluding nuclear reactions. D) Delta E_rxn determined using constant volume calorimetry. E) All of the above are true. Use the Delta H degree _f and Delta H degree _rxn information provided to calculate Delta H degree _f for IF: Delta H degree _f(kJ/mol) IF_7(g) + I_2 (g) rightarrow IF_5(g) + 2 IF (g) Delta H degree _rxn