Hydrogen produced molar volume of any gas at room

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Unformatted text preview: re consistent with the following equation for the reaction Mg + 2HCl MgCl2 + H2 (1) 12 *P38433A01224* (e) Calculate the maximum mass of magnesium chloride that would be formed in this reaction. Give your answer to three significant figures. (3) (Total for Question 17 = 7 marks) *P38433A01324* 13 Turn over 18 Copper(II) sulfate exists as blue hydrated crystals and white anhydrous crystals. The enthalpy changes of solution for these two substances may be represented by the following simplified equations: CuSO4.5H2O(s) + aq blue CuSO4(s) + aq white CuSO4(aq) H1 = +11.5 kJ mol–1 H2 = –66.1 kJ mol–1 CuSO4(aq) (a) (i) Fill in the box and add labelled arrows to complete the Hess cycle to enable you to calculate Hreaction. (3) CuSO4.5H2O(s) Hreaction CuSO4(s) + 5H2O(l) (ii) Calculate a value for the enthalpy change Hreaction. (2) (b) Suggest why it is not possible to directly measure the enthalpy change for the conversion of the blue hydrated copper(II) sulfate crystals into the white anhydrous crystals. (1) . . . . . . . . . . ............................... .............................................................. . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................... .............................................................. . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................... .............................................................. . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................... .............................................................. . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 *P38433A01424* *(c) (i) CuSO4.5H2O(s) + aq CuSO4(aq) H1 = +11.5 kJ mol–1 Describe briefly the experimental procedure that you would use to obtain the data necessary to calculate H1, given a known mass of hydrated copper(II) sulfate crystals, CuSO4.5H2O(s). You should state the apparatus that you would use and any measurements that you would make. You are not required to calculate the amounts of substances or to explain how...
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This note was uploaded on 09/22/2013 for the course CHEMISTRY Organic Ch taught by Professor Yang during the Fall '12 term at British School Of Washington.

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