equilibrium 2

Question 1

le Chatelier principle

Answer 1

if the equilibrium system is subjected to change, the system will adjust itself (by either shifting right or left) to partially oppose this change.

Question 2

what does and does nto affect le chatelier principle

Answer 2

this principle only occurs if: temp changes, introduction of reactant or product, changing pressure by changing volume, dilution changing.
0 does not the get affect but catalyst and inert gas.

Question 3

if forward reaction is exothermic and the temp increase

Answer 3

if the equilibrium system undergoes a temperature increase, this change will be partially oppose. This is done by the position of equilibrium shifting to the left, causing a net backward reaction (endothermic) to occur. This will partially oppose the temperature increase.
- rate of reaction will increase

Question 4

if forward reaction is exothermic and the temp decreases

Answer 4

if the equilibrium system undergoes a temperature decrease, this change will be partially oppose. This is done by the position of equilibrium shifting to the right, causing a net forward reaction (exothermic) to occur. This will partially oppose the temperature decrease.
- rate of reaction will decrease

Question 5

if forward reaction is endothermic and temp increases

Answer 5

if the equilibrium system undergoes a temperature increase, this change will be partially oppose. This is done by the position of equilibrium shifting to the right, causing a net forward reaction (endothermic) to occur. This will partially oppose the temperature increase.
- rate of reaction will increase

Question 6

if forward reaction is endothermic and temp decreases

Answer 6

if the equilibrium system undergoes a temperature decrease, this change will be partially oppose. This is done by the position of equilibrium shifting to the left, causing a net backward reaction (exothermic) to occur. This will partially oppose the temperature decrease.
- rate of reaction will decrease

Question 7

adding extra reactant

Answer 7

• same as removing products
• results in the system partially opposing this change by undergoing a net forward reaction

Question 8

adding extra product

Answer 8

• same as removing reactants
• this change is partially opposed by the equilibrium system by undergoing a net backward reaction to produce more reactant

Question 9

increasing pressure

Answer 9

• decreases volume (c=n/v)
• favours the side which has less gaseous particles as its already so concentrated

Question 10

decreasing pressure

Answer 10

• increases volume
• favours the side which ahs most gaseous particles as its not as concentrated

Question 11

dilution

Answer 11

• only when water is added
• volume increases, thus concentration decreases
• as a result is favours the side with the most amount of solutes/ aqueous particles
• everything spikes down

Question 12

adding a catalyst

Answer 12

• rate of forward and backward reaction increase simultaneously but also equally, meaning no net shift occurs
• helps establish equilibrium faster, but does not affect equilibrium constant or concentration

Question 13

adding an inert gas

Answer 13

• the pressure for the mixture increases without changing the volume as the chemical moles don’t change
• they do however decrease the likelihood of collisions between reactants and as a result decrease rate of reaction