Hey guys, came across this question and can’t figure it out. Would really appreciate it if someone could talk me through a solution!
Here it is:
Estimate the mean bond enthalpies of the P-Cl bond in PCl3(l).
Enthalpy change of formation: PCl3 (l) = -320
Enthalpy changes of atomisation: phosphorus = +315, chlorine = +122
Enthalpy change of vaporisation: PCl3(l) = +33
I know I have to draw a Hess’ cycle but can’t figure out how to connect all the different state changes and put in the right values.