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A2 1 Further Physical and Organic Chemistry

Quick questions on Thermodynamics and lattice enthalpy: Born-Haber cycles, entropy and free energy - CCEA A-Level Chemistry

3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?
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Define the lattice enthalpy of formation. [1 mark]
What is q2?
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Write the equation linking enthalpy of solution, lattice enthalpy of dissociation and hydration enthalpies. [1 mark]
What is q3?
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A reaction has ΔH=−50 kJ mol−1\Delta H = -50\ \text{kJ mol}^{-1} and ΔS=−100 J K−1 mol−1\Delta S = -100\ \text{J K}^{-1}\,\text{mol}^{-1}. Calculate ΔG\Delta G at 298 K298\ \text{K} and state if it is feasible. [2 marks]

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