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Flashcards in TOPIC 5 Deck (21):
1

What type of chemical does a chemical store

They store different chemicals store different amounts

2

What does it mean if the product of a reaction store more energy than the original reactant

Then they must of taken in the difference in energy between the products and reactant from the surrounding during the reaction

3

What if the products store less

Then the exec was energy was transferred to the surrounding d during the reaction

4

Why doesn’t the overall energy change

This is because energy is conserved in reactions- it can not be created of destroyed only moved around.

5

What is exothermic reaction

It is when her is given out
It transfers energy to the surroundings usually by heating.

6

How is exothermic shown

By a rise in temperature

7

What is the best example of an exothermic reaction

It is burning fuels- also called Combustion

8

What is neutralisation an example of

Exothermic reaction

9

Many oxidation are what

They are exothermic reason

10

Give an example of exothermic reaction in everyday uses

Some hand warmers
Self heating cans
Exothermic reaction

11

What is endothermic reaction

When energy is taken in
An exothermic reaction is one which takes in energy from from the surroundings

12

How is temperature shown in

A fall in temperature

13

What is endothermic reaction include

Thermal decomposition

14

Give examples of endothermic reaction in everyday uses

Sports injury packs
Instantly cooler

15

What are reaction profiles

Diagrams that show the relative energies of the reactant and products in a a reaction and how the energy changes over time

16

What do reaction profile show

Exothermic reaction- the products are at its lowest energy than the reactants

17

What does the initial rise represent

The energy needed to start the reaction. The is the activation energy

18

What is the activation energy

It is the minimum amount of energy the reactants that need to collide with each other and react.

19

What if the activation energy is a lot

It will need more energy to start a reaction

20

What is shown in the endothermic reaction

The activation energy

21

What does the difference in height Show

Represents the overall energy change during the reaction