What does the term 'activation energy' refer to?

Which process describes a reaction that absorbs heat from its surroundings?

Which factor does not affect the rate of a chemical reaction?

What is the standard enthalpy of formation of an element in its most stable state?

A catalyst increases reaction rate by:

Gibbs free energy determines the spontaneity of a reaction; a negative value indicates the reaction is:

According to the collision theory, reaction rate increases when:

Which thermodynamic quantity measures the randomness of a system?

What is the order of a reaction if rate is proportional to the square of reactant concentration?

What is Hess's Law used for?

At chemical equilibrium, the rate of forward reaction is: