Question

What is the enthalpy of a reaction, if the standard heat of formation of a compound is 10 J and sensible heat of the compound is 5 J?

(a) 0

(b) 5 J

(c) 10 J

(d) 15 J

This question was posed to me during a job interview.

My enquiry is from Merging Heat of Formation with Sensible Heat of Compound in section 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

Correct choice is (d) 15 J

For explanation: Enthalpy of reaction = 10 + 5 = 15 J.