Answer to Question #75772 in Physical Chemistry for Naveen

Question

If 2 mole of H2 completely react with 2 mole of Cl2 to form HCl.What is ∆U° for this reaction?
(1)0
(2)-185kJ
(3)370kJ
(4)-370kJ

Answer 1

Solution: 2H2 + 2Cl2 = 2HCl
ΔH = −92.30 kJ/mol*
For 2 moles: 2 x (-92.30) = -184.6 kJ.
Answer: (2) -185 kJ. *https://en.wikipedia.org/wiki/Standard_enthalpy_of_formation