Bond Energy and Activation Energy

Bond energy is the energy WHAT or the energy WHAT

Bond energy is the energy REQUIRED to BREAK a CHEMICAL BOND or the energy RELEASE when a BOND is FORMED

The WHAT of a reaction represents the WHAT from WHAT the bonds in the reactants and WHAT the bonds of the products

The CHANGE in ENTHALPY of a reaction represents the NET EFFECT from BREAKING the bonds in the reactants and FORMING the bonds of the products

In exothermic reactions, bonds breaking absorbs WHAT energy than the bond formation gives off, resulting in a WHAT

In exothermic reactions, bonds breaking absorbs LESS energy than the bond formation gives off, resulting in a -ΔH

In endothermic reactions bond breaking absorbs WHAT energy than the bond formation gives off, resulting in a WHAT

In endothermic reactions bond breaking absorbs MORE energy than the bond formation gives off, resulting in a +ΔH

Bond breaking = WHAT energy

ADDING energy

Bond forming = WHAT energy

RELEASING energy

The energy barrier that must be overcome for a chemical reaction to occur is called the WHAT

ACTIVATION ENERGY

Examples of activation energy include:

An IGNITION source (burning match, a spark, electricity)

The atoms in the WHAT have to be WHAT in order for them to bond in a different WHAT and become WHAT

The atoms in the REACTANTS have to be “PULLED APART” in order for them to bond in a different CONFIGURATION and become PRODUCTS

The activation energy is always WHAT than the energy contained in the reactants and the products, however the amount of activation energy is dependent on the reaction

HIGHER

Collision Theory:

Particles must collide with

1. The proper WHAT

2. Sufficient WHAT

Collision Theory:

Particles must collide with

1. The proper ORIENTATION of MOLECULES

2. Sufficient COLLISION ENERGY