Endothermic and Endothermic Reactions

Question 1

Why doesn’t the overall amount of energy change

Answer 1

Because energy is conserved in reactions, it can’t be created or destroyed only move

Question 2

What is an exothermic reaction

Answer 2

Transfers energy to the surroundings usually by heating, shown by a rise in temperature

Question 3

What is an example of an exothermic reaction

Answer 3

Combustion
Neutralization
Oxidation reactions

Question 4

Name 2 everyday uses of exothermic reactions

Answer 4

Hand warmers

Self heating cans

Question 5

What is an endothermic reaction

Answer 5

Takes in energy from the surroundings, shown by a fall in temperature

Question 6

Examples of endothermic reactions

Answer 6

Citric acid and sodium hydrogencarbonate

Thermal decomposition

Question 7

Name a everyday uses of endothermic reactions

Answer 7

Sports injury packs

Question 8

How can you see energy changes

Answer 8

Reaction profiles - show the relative energies of the reactants and the products in a reaction

Question 9

What is activation energy

Answer 9

Minimum amount of energy the reactant need to collide with each other and react, the greater the activation energy the more energy needed to start the reaction

Question 10

Where would the line be representing the products formed if it was a endothermic reaction

Answer 10

Higher than the reactants line

Question 11

Where would the line be representing the products formed if it was a exothermic reaction

Answer 11

Lower than the line for reactants