137. Solving a chemistry problem

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92. Calculate the change in entropy ∆S ° under standard conditions for the reactions:
2C2H5C1 2Na = C4H10 2NaCI,
2CH3OH = CH3-O-CH3 Н20 (l),
С2Н5ОН СНзСООН = Н3СООС2Н5 Н20 (g).

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