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3 marksEnergetics

CAPE Chemistry Unit 1 · 2006 · Paper 1 · Question 3(b)(iii)

Any chemical change involves processes of bond making and bond breaking. Classify EACH process as exothermic or endothermic and, hence, explain the value obtained in (b)(ii) on page 5.

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Other parts of this question

  1. 3(a)Define the term 'enthalpy change of solution'.[1 mark]
  2. 3(b)(i)State Hess' Law.[1 mark]
  3. 3(b)(ii)Use the data in Table 2 and apply Hess' Law to determine the enthalpy of solution of hydrogen fluoride gas.[5 marks]

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