chapter 19

Question 1

homogeneous equilibrium

Answer 1

contains equilibrium species that all have the same state or phase

Question 2

heterogeneous equilibrium

Answer 2

contains species that have different states or phases

Question 3

mole fraction

Answer 3

the mole fraction of a gas is the same as its proportion by volume to the total volume of gases in the gas mixture

x(A)= number of moles of A/ total number of moles in gas mixture

Question 4

partial pressure

Answer 4

the partial pressure p of a gas is the contribution a gas makes towards the total pressure

p(A)= x(A) x P

Question 5

Kp

Answer 5

H2 + I2 –> 2HI

kp= p(HI)2/p(H2)xp(I2)

Question 6

do equilibrium constants change?

Answer 6

at a set temp, K is constant and does not change despite any modifications to conc, pressure or presence of a catalyst
- k does change if the temp is changed

Question 7

effect of temp on K- exothermic reactions

Answer 7

• eq constant decreases w/ increasing temp

- raising temp decreases eq yield of the products

Question 8

effect of temp on k- endothermic reactions

Answer 8

• eq constant increases w/ increasing temp

- raising the temp increases eq yield of products