Exothermic and Endothermic reactions

What is an Exothermic reaction

An exothermic reaction is one that transfers energy to the surroundings so the temperature of the surroundings increases.

What are the three examples of Exothermic reactions

Combustion

Neutralisation reactions

Many oxidation reactions

What’s re the everyday uses of Exothermic reactions

-Hand warmers

-Self-heating cans

Draw a Exothermic energy profile

What is a Endothermic reaction

An endothermic reaction is one that takes in energy from the surroundings so the temperature of the surroundings decreases.

What are examples of Endothermic reactions

-Thermal decomposition

-Reaction of citric acid and sodium hydrogen carbonate

What is a every day uses of endothermic reaction

Sports injury sockets to all them to become instantly cooler.

Draw a endothermic energy profile

When can chemical reactions occur

Chemical reactions can occur only when reacting particles collide with each other and with sufficient energy

What is Activation energy

The minimum amount of energy that particles must have to react is called the activation energy.

When breaking bonds what process is required

Endothermic

When making bonds what process is required

Exothermic

In an Exothermic reaction energy released from forming new bonds….

Is greater than the energy needed to break existing bonds

In an endothermic reaction, the energy needed to break existing bonds is

greater than the energy released from forming new bonds

What the equation for finding overall energy change

Energy requires to break bonds(Left side) - energy released by forming bonds