Question

The products of a certain chemical reaction contain 30kJ of potential energy, and the reactants contain 4 kJ. How much energy is released or absorbed by the reaction?

A. 26 kJ is released.
B. 34 kJ is released.
C. 34 kJ is absorbed.
D. 26 kJ is absorbed.

Answer 1

The answer is D

26KJ is adsorbed

Answer 2

The energy released or absorbed by the reaction is the difference between the potential energy of the products and the potential energy of the reactants.

Potential energy released or absorbed = potential energy of products - potential energy of reactants

Potential energy released or absorbed = 30 kJ - 4 kJ = 26 kJ

Therefore, the energy released or absorbed by the reaction is 26 kJ, which means option A is correct.