Answer to Question #348241 in General Chemistry for cece

Question

1. The combustion of benzene is the following reaction:

C₆H₆ (l) + 7.5 O₂ (g) è 6 CO₂ (g) + 3 H₂O (g) Δ H =?

Using Hess’ Law, find the enthalpy change, Δ H, for this reaction by combining these reactions:

 6 C (graphite) + 3 H₂ (g) è C₆H₆ (l)  ΔH = + 49.0 kJ

C (graphite) + O₂ (g) è CO₂ (g)  ΔH = -394 kJ 

H₂ (g) + ½ O₂ (g) è HOH (l)  ΔH = -286 kJ

Answer 1

∆H = - 3272 kJ