Given two process : 1 / 2 {P}_{4}( {s})+3 {Cl}_{2}( {g}) \to 2 {PCl}_{3}(l); \\Delta{H}=-635 {k} {J} {PCl}_{3}( {l})+ {Cl}_{2}( {g}) \to{PCl}_{5}( {s}); \\Delta{H}=-137 {k} {J} The value of \\Delta{H}_{ {f}} of {PCl}_{5} is:

Correct Answer is : -454.5 kJ/mol

NEET 2019 Model Question Paper 3

Question : 140 of 180

Marks: +1, -0

Given two process :

P4(s)+3Cl2( g)→2PCl3(l); ΔH=−635kJ
PCl3(l)+Cl2(g)→PCl5(s); ΔH=−137kJ
The value of ΔHf of PCl5 is:

Go to Question:

Prev Question

Next Question