Urea on hydrolysis produces ammonia and carbon dioxide. The standard e

1.	Urea on hydrolysis produces ammonia and carbon dioxide. The standard entropies of urea, H2O. CO2, NH3 are 173.8, 70, 213.5 and 192.5 J mole-1K-1 respectively. Calculate the entropy change for this relation.
Answer» Given, S°(urea) = 173.8 J mol^-1 K^-1 S° (H₂O) = 70 J mol^-1K^-1 S° (CO₂) = 213.5 J mol^-1 K^-1 S° (NH₃) = 192.5 J mol^-1 K^-1 NH₂ – CO – NH₂ + H₂O → 2NH₃ + CO₂ ∆S_r° = ∑(S°)_product – ∑(S°)_reactants ∆S_r° = [2 S°(NH₃) + S°(CO₂)] — [S°(urea) + S°(H₂O)] ∆S_r° = [2 x 192.5 + 213.5] – [173.8 + 70] ∆S_r° = [598.5] – [243.8] ∆S_r° = 354.7 J mol^-1K^-1

Urea on hydrolysis produces ammonia and carbon dioxide. The standard entropies of urea, H2O. CO2, NH3 are 173.8, 70, 213.5 and 192.5 J mole-1K-1 respectively. Calculate the entropy change for this relation.

Answer»

Given,

S°(urea) = 173.8 J mol^-1 K^-1

S° (H₂O) = 70 J mol^-1K^-1

S° (CO₂) = 213.5 J mol^-1 K^-1

S° (NH₃) = 192.5 J mol^-1 K^-1

NH₂ – CO – NH₂ + H₂O → 2NH₃ + CO₂

∆S_r° = ∑(S°)_product – ∑(S°)_reactants

∆S_r° = [2 S°(NH₃) + S°(CO₂)] — [S°(urea) + S°(H₂O)]

∆S_r° = [2 x 192.5 + 213.5] – [173.8 + 70]

∆S_r° = [598.5] – [243.8]

∆S_r° = 354.7 J mol^-1K^-1

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Urea on hydrolysis produces ammonia and carbon dioxide. The standard entropies of urea, H2O. CO2, NH3 are 173.8, 70, 213.5 and 192.5 J mole-1K-1 respectively. Calculate the entropy change for this relation.

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