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So what actually is entropy?

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Entropy again and how it can drive energetically unfavourable reactions to occur spontaneously.

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The Laws of Thermodynamics, Entropy, and Gibbs Free Energy

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Practice questions. Answers are linked in the comments below.

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Here you will find some past paper questions on the topic. The link to the answers can be found in the comments.

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Get access to files anywhere through secure cloud storage and file backup for your photos, videos, files and more with Google Drive.

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Answers are linked in the comments

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Revising q=mc∆T, bond enthalpies, ∆H formation, solution cycles

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Use your knowledge of Hess's Law and calorimetry to find an unknown ∆H.

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Here is a resource for practicing

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Answers in the comments

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Max, Memo, Kane, Bambi (NaCL)

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Make sure you allow flash to interact with this site.

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Energetics: 4.32 - Hess' law energy cycles and diagrams

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IB Chemistry Energetics - Hess' law manipulation of equation may be represented in so-called Hess' cycles or diagrams.