AQA AS Jun 2016 Paper 2 Q1

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Ethene reacts with steam in the presence of an acid catalyst to form ethanol. Section A Answer all questions in this section. CH2=CH2(g) + H2O(g)CH3CH2OH(g) Deduce the units of Kc. . 1 Write an expression for the equilibrium constant Kc for this equilibrium. [2 marks] Expression Units 0 1 0 1 . 2 An equilibrium mixture was found to contain 0.700 mol of ethene, 1.20 mol of steam and 4.40 mol of ethanol at a temperature T. The volume of the container was 2.00 dm3. Calculate a value of Kc for this equilibrium at this temperature. Give your answer to an appropriate number of significant figures. [2 marks] *02* M/JUN16/7404/2<br /> Turn over for the next questionDO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED *03* Turn overM/JUN16/7404/2<br />

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