Ethanol can be manufactured by reacting ethene, $C_2{H}_4,$ with steam.

$C_2{H}_4(g)+H_{2}O(g)C_2{H}_{5}OH(g)$

a Write the equilibrium expression in terms of partial pressures, $K_p,$ for this reaction.

b State the units of $K_p$ for this reaction.

C The reaction is at equilibrium at $290C$ and $7\mathrm{.}00{10}^{6}Pa$ pressure. Under these conditions the partial pressure of ethene is $1\mathrm{.}50{10}^{6}Pa$ and the partial pressure of steam is $4\mathrm{.}20{10}^{6}Pa.$

I. Calculate the partial pressure of ethanol.

ii Calculate the value of the equilibrium constant, $K_p,$ under these conditions.

d The reaction is carried out in a closed system. Explain the meaning of the term closed system.

Use Le Chatelier's principle to explain what will happen to the position of equilibrium in this reaction when the pressure is increased.