
Interpretation: In an exothermic reaction, the source of thermal energy needs to be explained.
Concept introduction: Thermal energy is total kinetic energy that combined with motion and mass of particles in a sample of matter measured as heat energy.

Answer to Problem 3RE
Thermal energy of an exothermic reaction is result of bond making releasing energy than is required for bond breaking for reaction.
Explanation of Solution
Of an exothermic reaction thermal energy is result of bond making releasing energy than is required for bond breaking for reaction.
Thermal energy is dependent on mass of the sample and average kinetic energy.
Chapter U5 Solutions
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