Chapter 17 chemical equilibrium

Question 1

reversible reaction

Answer 1

one in which the products react back to give the

reactants

Question 2

chemical equilibrium

Answer 2

a state of dynamic balance in a reversible reaction where the forward/backward rate of reaction is the same

Question 3

dynamic state

Answer 3

the reactants are continuously making products and the products are continuously making reactants

Question 4

le chartelier’s principal

Answer 4

states that if stress(temp. concentration, pressure) is applied to a system at equilibrium the system re-adjusts to relieve the stress applied

Question 5

(effect) when… to an eq. system : pressure increased

Answer 5

equilibrium shifts to the side with a lower no. of

molecules

Question 6

(effect) when… to an eq. system : pressure decreased

Answer 6

equilibrium shifts to the side with a higher no. of molecules

Question 7

(effect) when… to an eq. system : temp inc.

Answer 7

endothermic reaction is favored

Question 8

(effect) when… to an eq. system : temp dec.

Answer 8

exothermic reaction is favored

Question 9

(effect) when… to an eq. system : concentration of x inc.

Answer 9

reaction that removes x is favored

Question 10

(effect) when… to an eq. system : concentration of x

dec.

Answer 10

reaction that forms x is favored

Question 11

le chatlier principal : ammonia

Answer 11

conditions under which the Harber process is carried out are a compromise between yield of ammonia , time, cost/safety (low temp, high pressure= not viable)

Question 12

le chatlier principal :sulphuric acid

Answer 12

conditions for the contact process are a compromise rather than based strictly on the principal (low temp. high pressure[liquefy the SO2] = not viable)