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2 April, 03:08

What is the value for ΔSºreaction for the following reaction, given the standard entropy values?

Al2O3 (s) + 3H2 (g) → 2Al (s) + 3H2O (g)

Substance Sº (J/mol*K)

Al2O3 (s) 51

H2 (g) 131

Al (s) 28

H2O (g) 189

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Answers (1)
  1. 2 April, 03:14
    0
    Substituting the values:

    51 + 3 (131) = ΔH + 2 (28) + 3 (189)

    ΔH = - 225 J/mol

    When written outside of the equation, this becomes 225 J/mol
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