Chapter 5 Revision

Question 1

Exothermic example

Answer 1

Neutralisation and combustion

Question 2

Entropy examples

Answer 2

Phase change of substances

Question 3

Solid deposition

Answer 3

Gas to solid, no liquid

Question 4

Exothermic what’s stable

Answer 4

Products

Question 5

What’s entropy

Answer 5

Disorder

Question 6

When entropy is negative that means

Answer 6

There’s more order, less gas particles in the products

Question 7

Gibbs free energy

Answer 7

Looks at spontaneos reaction

Question 8

When delta g is negative

Answer 8

Reaction is spontaneous

Question 9

When delta g is positive

Answer 9

Reaction is non spontaneous

Question 10

Delta g uses what unit

Answer 10

Kelvin

Question 11

Delta t uses what unit

Answer 11

Degrees

Question 12

Delta g is negative that means what is favoured

Answer 12

Favours products

Question 13

Delta g is positive that means what is favoured

Answer 13

Favours reactants

Question 14

What’s delta h of combustion ( when they ask you to use section 13 of booklet )

Answer 14

Do,
Hc of reactants - Hc of products

Question 15

Delta h of formation

Answer 15

Delta f of products minus delta f pf reactants

Question 16

Factors that affect rate

Answer 16

Surface area
Temp
Catalyst
Pressure, volume, concentration
^^ same

Question 17

How do catalysts lower energy

Answer 17

They provide an alternative pathway with lower activation energy