Given the thermochemical equations, Ni + Cl₂ → NiCl₂ ΔH = −383 kJ
NiCl₂ + Cl₂ → NiCl₄ ΔH = −192 kJ
What is the ΔH for 2NiCl₂ → Ni + NiCl₄?

Question

Given the thermochemical equations, Ni + Cl₂ → NiCl₂ ΔH = −383 kJ NiCl₂ + Cl₂ → NiCl₄ ΔH = −192 kJ What is the ΔH for 2NiCl₂ → Ni + NiCl₄?

Quizplus · Accepted Answer

To find the ΔH for the given reaction, reverse the first equation and add it to the second equation. Reversing the first equation changes the sign of ΔH to +383 kJ. Adding this to the second equation's ΔH of -192 kJ gives a total ΔH of +191 kJ for the desired reaction.

Given the Thermochemical Equations, Ni + Cl2 → NiCl2 ΔH

Given the Thermochemical Equations, Ni + Cl₂ → NiCl₂ ΔH