8. Thermochemistry
Hess's Law
8. Thermochemistry Hess's Law
23PRACTICE PROBLEM
The reaction of P4(g) and chlorine gas to form PCl5(g) has a ΔH = –433.8 kJ/mol. On the other hand, the reaction of PCl3(g) and chlorine gas to form PCl5(g) has a ΔH = –87.9 kJ/mol. In these conditions, what is the enthalpy of the formation of PCl3(g)?
The reaction of P4(g) and chlorine gas to form PCl5(g) has a ΔH = –433.8 kJ/mol. On the other hand, the reaction of PCl3(g) and chlorine gas to form PCl5(g) has a ΔH = –87.9 kJ/mol. In these conditions, what is the enthalpy of the formation of PCl3(g)?