For the equilibrium at 700 K

CHEMISTRY · Single correct · A Level · Chemistry · Gaseous equilibria (Kp) · Gaseous equilibria (Kp)

Problem

For the equilibrium

2\,\text{SO}_2(g)+\text{O}_2(g)\;\rightleftharpoons\;2\,\text{SO}_3(g)

at 700 K, which statement correctly describes how

K_p

compares with

K_c

? (a)

K_p

equals

K_c

because both constants are measured at the same temperature. (b)

K_p

is greater than

K_c

because the total number of moles of gas decreases. (c)

K_p

is less than

K_c

because the total number of moles of gas decreases. (d) The relationship between

K_p

and

K_c

cannot be determined without additional enthalpy information.