Chwmistry Topic 5- need t finish

Question 1

What is a exothermic reaction

Answer 1

Transfer energy to the surroundings

Question 2

What is a example of exothermix reaction

Answer 2

Burnings fuels/ combustion

Question 3

What is a endothermic reaction

Answer 3

One which takes in energy from the surroundings

Question 4

Exothermic reaction everyday uses

Answer 4

Hand warmers

Self heating cans

Question 5

Endothermic reactions every day use

Answer 5

Sport injury packs

Question 6

What do reaction profiles show

Answer 6

Relative energies of products and reactants in a reaction and shows how the energy changes over time

Question 7

What is the activation energy on graphs

Answer 7

Minimum amount of energy the tea tents need to collide with eachother and react. The greater this is the more energy is requires

Question 8

What is a electrochemical cell

Answer 8

Basic system made up of two different electrodes in contact with an electrolyte

Question 9

What do the two electrodes need to be able to do in a cell

Answer 9

Conduct electricity

Question 10

What is electrolyte in a cell

Answer 10

Liquid which contains ion and reacts with electrodes

Question 11

What is a fuel cell

Answer 11

Electrical cell which is supplied with fuel and oxygen and uses energy from the reaction between them to produce electrical energy