Rates Of Reaction

Question 0

Conditions for cracking

Answer 0

Catalyst - zeolite

Temperature - 450

Question 1

Two economically important processes that uses catalyst

Answer 1

Harber process - iron catalyst

Cracking - zeolite catalyst

Question 2

Conditions for haber process

Answer 2

Catalyst - iron
Temperature - 400-500
Pressure - 200atm

Question 3

Le Chatelier’s principle

Answer 3

In dynamic equilibrium the position of equilibrium shifts to counteract change

Question 4

What is a Catalyst

Answer 4

A substance that increases rate of reaction but is not used up

Question 5

Factors that affects the Position of equilibrium

Answer 5

Temperature
Pressure - moles
Concentration

Question 6

Why doesn’t a Catalyst affect the position of equilibrium?

Answer 6

Because it increases the rate of forward and reverse reaction

Question 7

Dynamic equilibrium

Answer 7

Equilibrium that exist in a close system where the rate of forward reaction in equal to rate of reverse reaction

Question 8

What does the Boltzmann distribution show

Answer 8

The distribution of particle energies at a particular temperature

Question 9

What are the features of the Boltzmann distribution

Answer 9

• Under the curve show the total number of particles in the reaction and does not change with different conditions
• no molecules have 0 energy
• there is no maximum energy so curve does not touch axis
• only particles pass activation energy can react

Question 10

ROR collision theory - factories that affect rate of reaction

Answer 10

Temperature 
Pressure
Concentration
Surface area
Adding a catalyst

Question 11

Hess law

Answer 11

A reaction could take place through more than one route, with the initial and final conditions being the same

Question 12

Enthalpy cycle - combustion

Answer 12

B - C = A

Question 13

Enthalpy cycle - formation

Answer 13

-B + C = A

Question 14

Enthalpy change of combustion

Answer 14

Enthalpy change that takes place when one mole of a substance reacts completely with oxygen under standard conditions

Question 15

Enthalpy change of formation

Answer 15

Enthalpy change that takes place when one mole of a compound in it’s standard state is formed from it’s constituent elements in their standard states under standard conditions

Question 16

Enthalpy change of reaction

Answer 16

Enthalpy change that accompanies a reaction in the molar quantities expressed in a chemical equation under standard conditions