In a rigid container

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

Problem

In a rigid container, an equilibrium mixture is prepared at a certain temperature by introducing

0.80\,\text{atm}

\mathrm{SO_2(g)}

0.40\,\text{atm}

\mathrm{O_2(g)}

, and no

\mathrm{SO_3(g)}

. The following reaction occurs:

2\,\mathrm{SO_2(g)} + \mathrm{O_2(g)} \rightleftharpoons 2\,\mathrm{SO_3(g)}.

When equilibrium is reached, the total pressure in the container is

1.05\,\text{atm}

. What is the value of

K_p

at this temperature? (a)

2.4

(b)

0.72

(c)

1.4

(d)

0.21