Determine the sign of S for the following (qualitatively) 1. Liquid nitrogen eva

Question

Determine the sign of S for the following (qualitatively) 1. Liquid nitrogen evaporates 2. Two clear liquids are mixed and a solid yellow precipitate forms 3. Liquid water is heated from 22.5 C to 55.8 C Determine the sign of S for the following (qualitatively) 1. Liquid nitrogen evaporates 2. Two clear liquids are mixed and a solid yellow precipitate forms 3. Liquid water is heated from 22.5 C to 55.8 C Determine the sign of S for the following (qualitatively) 1. Liquid nitrogen evaporates 2. Two clear liquids are mixed and a solid yellow precipitate forms 3. Liquid water is heated from 22.5 C to 55.8 C

Explanation / Answer

Q1.

for nitrogen to evaporate, this is liquid to gas, this must be chaotic, since vapor phase is chaotic, therefore dS > 0 (positivE)

Q2

formation of a solid will always be an orden creation, since solid molecules have very complex crystals vs. random movement of the solution, dS < 0 , negative

Q3

heating water will increase T, therefore moelcules move faster, more chaotic, so dS > 0

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