Endothermic and Exothermic Reactions

Endothermic Reactions

Exothermic Reaction

Endothermic- Reaction in which is given out

Exothermic Reaction- A reaction which heat is given out

The Act of releasing heat energy which cause the temperature to increase

More energy is given out than is taken in (e.g. burning, respiration)

Endothermic

Endothermic

Endothermic

Endothermic

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A chemical reaction is where HEAT is transferred from the surroundings. Which indicate by a fail in the temperature.

If forming new bonds releases more energy than it takes to break the old bonds, the reaction will be Exothermic

Release heat energy the temperature will increases

Photosynthesis is an important example of an Endothermic Reaction.

If forming new bonds the products release less energy then it took to break the bonds

The burning reactions including the combustion of fuels, the detonation of explosives, Reaction of acids with metals or even The hot reaction products lose heat to the surrounding and they return to room temperature.

State of Matter

Exothermic: Energy released > Energy Used

The rate of reaction between a solid and a gas or liquid will cause the rate of reaction to increase. The surface area of the solid reactant increases the number of collisions per second and which causes increases to reaction rate.

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Temperture

If you were to increase the temperature you will be increasing the reaction rate due to there being a large increase in the number of high energy collisions.

Pressure

Surface Area

Changing the pressure on a reaction that involves only solids or liquids has no effect on the rate. But increasing the pressure on a reaction involving reacting gases increases the rate of reaction.

Catalyst and Inhibits

Concentration

An increased chance of collisions between reactant particle which mean there are more collisions.

All the reactants increases and more molecules or even ions interact to form new compounds.

They will reduce the rate of an enzyme catalyses reaction by interfering with the enzyme