equillbria, le chateliers principle and kc

Question 1

what is dynamic equillibrium

Answer 1

forward and reverse reactions proceed at equal rates
the concentrations of reactants and products remain constant

Question 2

state le chatieliers principle

Answer 2

when a system is subject to change, the system will alter to lessen the effect of that change

Question 3

use le chatiliers principle to predict effects of increases in temp on the position of equilibrium in homogenous reactions

Answer 3

increased temp favours endothermic reaction (+ enethlpy change)as the heat needs to be removed from the system to lessen effect of intial increase, will increase yield of the endothermic products

Question 4

use le chatiliers principle to predict effects of increses in pressure on the position of equilibrium in homogenous reactions

Answer 4

increasing pressure favours side of reaction wit fewer moles as it will help to release the build up in pressure, yeild of prodcuts on this side of reaction incresed

Question 5

use le chatiliers principle to predict effects of increasesin conc on the position of equilibrium in homogenous reactions

Answer 5

increasing cocnetration of reactants will favour the reaction producing the products as more molecules availble to react , will increases yield pf products

Question 6

use le chatiliers principle to predict effects of catalyst on the position of equilibrium in homogenous reactions

Answer 6

no effect as increases rate of reaction equally on both sides

Question 7

explain why for a reversible reaction used in industrial process a compromised temperature or pressure may be used

Answer 7

lower pressures and higher temperature than would give the maxiumum conversion as:
higher pressures would be too expensive
higher temp gives a good yield in a faster time

Question 8

effect of changes in conc or pressure, addition of catalyst and temp on value of Kc

Answer 8

conc, pressure and catalyst has no effext on Kc value
temperature changes Kc value