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    Measuring entropy change

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    What is the entropy change for 4Al + 3O2 --->2Al2O3.

    Choices -728, 102, -626, 728.

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    https://brainmass.com/chemistry/energetics-and-thermodynamics/measuring-entropy-change-48812

    Solution Preview

    Entropy Change is defined as the change in randomness.
    Gas is the most random state out of the three states (gas, liquid, solid)

    In this case, the reactants and products are consisted of
    reactant: 4 solid particles and 3 gas particles
    products: 2 solid ...

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    This solution answers and explains a multiple choice question on entropy change.

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