Answer to Question #171219 in General Chemistry for salma

Question

Given the following data:

2NO(g) ---> N₂(g) + O₂(g) ΔH = -180.6 kJ

N₂(g) + O₂(g) + Cl₂(g) ---> 2NOCl(g) ΔH = +103.4 kJ

Find the ΔH of the following reaction:

2NOCl(g) ---> 2NO(g) + Cl₂(g)    ΔH° = ??? kJ

Answer 1

$\Delta H=+180.6kJ-103.4kJ$

$\Delta H=+77.2kJ$