Use the equation delta S degree = sigma_i nu_i S degree (product)_i - sigma_j nu

Question

Use the equation delta S degree = sigma_i nu_i S degree (product)_i - sigma_j nu_j S degree (reactant)_j to calculate the delta S degree for the reaction: delta S degree = S degree [Mg^2 + (aq)] + 2S degree [Br^- (aq)] - S degree [MgBr_2 (s)] = (-138.1 J K^-1) + 2(80.71 J K^-1) - (117.2 J K^-1) = -93.9 J K^-1 Use your understanding of the salvation of ions at the molecular level to explain the sign of delta s degree. Water molecules solvate ions in solution, thereby creating order. The entropy of water is less than the entropy of a salt. This fact leads to the decreasing of entropy of the reaction. Water molecules don't solvate ions in solution, thereby creating disorder. The number of water molecules is more than ions of a salt. So, the entropy decreases.

Explanation / Answer

“Like Dissolves Like.”

This means that similar things dissolve similar things(Similar intermolecular forces. ).

Delta S is negative means that the reaction is non-spontaneous.

Means water molecules don't solvate ions in solution there by creating disorder.

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