Heat Vocabulary

Front

Collision Theory

Back

A theory that states that bonds are broken when molecules collide with enough energy to break bonds in reactants and with the correct orientation to form bonds that make products.

Front

Activated Complex

Back

An unstable cluster of atoms that exists during the transition from reactants to products.

Front

System

Back

A part of the universe on which you focus your attention.

Front

Surroundings

Back

Everything in the universe outside the system.

Front

Heat

Back

The energy transferred from one object to another because of a temperature difference between the objects.

Front

Internal energy

Back

The total energy contained in a system.

Front

Change in Enthalpy

Back

The heat absorbed or released by a reaction at constant pressure.

Front

Bond enthalpy

Back

The amount of energy needed to break the bonds in one mole of a substance.

Front

Enthalpy Diagram

Back

A representation of the relative internal energy of a system undergoing a chemical change.

Front

Enthalpy of Reaction

Back

The total change in energy for a reaction.