For the gas-phase equilibrium

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

Problem

\mathrm{2\,HI(g)\,\rightleftharpoons\,H_2(g)+I_2(g)}

K_p=0.020

700\,\text{K}

. The standard enthalpy change is

\Delta H^{\circ}=+51\,\text{kJ}

per

2\,\text{mol}

of HI. Calculate

K_p

750\,\text{K}

, taking

R=8.314\,\text{J\,mol}^{-1}\,\text{K}^{-1}