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

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

What does the term 'activation energy' refer to?

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

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

Which thermodynamic quantity measures the randomness of a system?

A catalyst increases reaction rate by:

What is Hess's Law used for?

According to the collision theory, reaction rate increases when:

According to the second law of thermodynamics, entropy of an isolated system tends to:

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