Chemistry Practice Problems Hess's Law Practice Problems Solution: Given the chemical reactions: 2 NO2(g) → N2(g) + ...

Solution: Given the chemical reactions: 2 NO2(g) → N2(g) + 2 O2(g)                  ΔH = −68 kJ N2O4(g) → N2(g) + 2 O2(g)                   ΔH = −10 kJ Determine the ΔH for the following reaction: N2O4(g) → 2 NO2(g)   A. −78 kJ B. −58 kJ C. 48 kJ D. 58 kJ E. 78 kJ

Problem

Given the chemical reactions:

2 NO2(g) → N2(g) + 2 O2(g)                  ΔH = −68 kJ

N2O4(g) → N2(g) + 2 O2(g)                   ΔH = −10 kJ

Determine the ΔH for the following reaction:

N2O4(g) → 2 NO2(g)

 

A. −78 kJ

B. −58 kJ

C. 48 kJ

D. 58 kJ

E. 78 kJ