Question

What is the name given to energy which must be provided in order for a chemical change to occur?

• A. Gibbs free energy
• B. Activation energy
• C. Potential energy
• D. Bond energy
• E. Kinetic energy

Answer 1

The correct option is B Activation energy

Activation energy may also be defined as the minimum energy required to start a chemical reaction. The activation energy of a reaction is usually denoted by $E_a$ and given in units of kilojoules per mole $\left(kJ/mol\right)$ or kilocalories per mole $\left(kcal/mol\right)$.

Gibbs energy is a thermodynamic potential that can be used to calculate the maximum or reversible work that may be performed by a thermodynamic system at a constant temperature and pressure.

The correct answer is activation energy.