Question

An endothermic reaction will start when the required

energy is received from the environment or solution.
AH
activation
thermal
kinetic

Answer 1

A: ΔH

Step-by-step explanation:

Endothermic reactions are this that occur as a result of absorption of heat energy from the surroundings by the reactants to form new products.

Thus, we can say it is one with an increase in enthalpy (ΔH) of the system.

Thus, option A is correct.