The plot of against for the reaction : SO _2( g ) + 1 2 O _2( g ) SO _3( g ) is a…

CHEMISTRY · Subjective · A Level · Chemistry · Gaseous equilibria (Kp) · Gaseous equilibria (Kp)

Problem

The plot of

\log_{10} K_P

against

\frac{1}{T}

for the reaction :

\text{SO}_2(\text{g}) + \frac{1}{2}\text{O}_2(\text{g}) \rightleftharpoons \text{SO}_3(\text{g})

is a straight line with slope

= 4.95 \times 10^3

. Calculate

K_P

at 25°C if standard entropies for

\text{SO}_2(\text{g})

\text{O}_2(\text{g})

and

\text{SO}_3(\text{g})

are 248.2, 205.1 and 256.8

\text{JK}^{-1}\text{mol}^{-1}

at 25°C respectively.