phosphorus-trichloride-is-formed-when-diphosphorus-reacts-with-chlorine-gas-the-

Question

Phosphorus trichloride is formed when diphosphorus reacts with chlorine gas. The reaction equation is P₂ + 3 Cl₂ → 2 PCl₃. Calculate the ΔH for the reaction (in kcal and in kJ) using the bond dissociation energies in the table below.

Table showing average bond enthalpy values for P≡P, Cl–Cl, and P–Cl in kcal and kJ.

Accepted Answer

ΔH = –123 kcal; ΔH = –516 kJ

Answer

ΔH = –123 kcal; ΔH = –133 kJ

Answer

ΔH = –285 kcal; ΔH = –516 kJ

Answer

ΔH = –285 kcal; ΔH = –133 kJ

Answer

ΔH = –30 kcal; ΔH = –570 kJ