Rates

Question 1

rate

Answer 1

change in concentration/time

Question 2

how to alter rate of reaction

Answer 2

concentration
pressure if gas
temperature
use of catalyst
surface area of solid reactant

Question 3

what does increasing conc or pressure do to the rate of reaction

Answer 3

increases rate of reaction as theres more molecules per unit volume so there’s more successful collisions

Question 4

catalyst

Answer 4

provides an alternative reaction pathway with a lower activation energy
not used up so regenerated

Question 5

homogenous catalyst

Answer 5

catalyst with the same physical state as reactants
reacts to form with reactants to form intermediate

Question 6

heterogenous catalyst

Answer 6

catalyst with different physical state from the reactant
usually solid
reactants are absorbed on surface of catalyst and products are deabsorbed after

Question 7

dynamic equillibrium

Answer 7

rate of forward=rate of backwards reaction
closed system

Question 8

Le Chateliers principle

Answer 8

when a system is in equillibrium is subjective to an external change the system readjust to minimise the effect of the change

Question 9

Kc

Answer 9

[products]/[reactants]

Question 10

Kp

Answer 10

use partial pressures

Question 11

mole fraction

Answer 11

moles of blue gas/ moles of total gas mixture
add up to 1

Question 12

partial pressure

Answer 12

mole fraction x total pressure

Question 13

suitable units for pressure

Answer 13

KPa
Pa
atm