Question

Enthalpy of reactants is 30 J/Kg and enthalpy of products is 10 J/Kg, what is the heat of reaction?

(a) -20 J/Kg

(b) 20 J/Kg

(c) -10 J/Kg

(d) 10 J/Kg

I had been asked this question in class test.

My question is from Standard Heat (Enthalpy) of Formation in portion Application of Energy Balances in the Absence of Chemical Reactions and Energy Balances: How to Account for Chemical Reaction of Basic Chemical Engineering

Answer 1

Right option is (a) -20 J/Kg

The explanation is: Heat of reaction = 10 – 30 = -20 J/Kg.