C8: Rates And Equilibrium

Question 1

Does Jenny smell

Answer 1

Yes

Question 2

How can you find out the rate of a reaction?

Answer 2

• Monitor the amount of reactants used up over time or measure the amount of products formed over time
• Draw a tangent to find out the rate of a reaction from a graph

Question 3

Collision theory
(Rule)
(Rate of a reaction)

Answer 3

• Particles must collide with a certain minimum amount of energy before they can react.
• The rate of a chemical reaction increases the surface area to volume ratio of any solid reactant. This increases the frequency of reactions

Question 4

What is activation energy

Answer 4

The minimum amount of energy that particles need in order to react

Question 5

What effect does temperature have on a reaction

Answer 5

• As temperature increases reactions happen more quickly

- Increase in temperature means that particles collide more frequently and more energetically

Question 6

Scully asked for mashed potato

Answer 6

So I wrote that down

Question 7

What is the effect of increasing concentration

Answer 7

Increasing the concentration of a reaction increases the frequency of collisions between particles

Question 8

What is the effect of increasing pressure

Answer 8

Increases the frequency of particles colliding

Question 9

What is the effect of a catalyst

Answer 9

Increase the rate of reaction

Question 10

Uses of catalysts

Answer 10

Different catalysts are used for different types of reactions

Catalysts are used in industries in order to increase rates of reaction and reduce energy costs

Question 11

What happens in a reversible reaction

Answer 11

• The products of the reaction can react to make the original reactants

Question 12

What is the opposite of a slump

Answer 12

Pmuls

Pronounced P-Moles

Question 13

What happens with energy in a reversible reaction

Answer 13

• One reaction is endothermic, one is exothermic

- The energy transferred in one direction is exactly the same as the energy transferred going the other direction

Question 14

What is dynamic equilibrium

Answer 14

• In a closed system, the rate of forward and reverse reactions are
  equal at equilibrium

Question 15

What is le Chatelier’s principle

Answer 15

• If a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium moves to counteract the change

Question 16

What happens when the temperature is increased and reaction referring to endothermic and exothermic reactions

Answer 16

Increasing temperature favours the endothermic reaction and decreasing the term operative favours he exothermic reaction.