Rates Of Reactions

Question 1

Combustion (Endo or exo)

Answer 1

Exothermic

Question 2

Neutralisation (endo or exo)

Answer 2

Exothermic

Question 3

Higher reactants and lower products in energy time graphs

Answer 3

Exothermic (energy lost to surroundings as heat)

Question 4

Reactants lower and products higher in energy time graphs

Answer 4

Endothermic (takes heat energy in from surroundings)

Question 5

Temperature change in exothermic reactions

Answer 5

Surroundings increase

Question 6

Temperature change in endothermic reactions

Answer 6

Surroundings decrease

Question 7

Ammonia

Answer 7

NH3

Question 8

Ammonium

Answer 8

NH4

Question 9

How do catalysts increase rate of reaction

Answer 9

Provide activation energy or an alternative reaction route to lower the activation energy needed

Question 10

Displacement reactions (endo or exo)

Answer 10

Exo

Question 11

Precipitation reactions (endo or exo)

Answer 11

Either endo or exo

Question 12

Salts dissolving in water (endo or exo)

Answer 12

Endo or exo depending on salt

Question 13

Activation energy

Answer 13

The minimum amount of energy needed to start a reaction