I need a answer for question no. 3 and 4. Easeous H2 to form liquid methanol c.

Question

I need a answer for question no. 3 and 4.

Easeous H2 to form liquid methanol c. Calcium phosphate precipitates upon mixing calcium nitrate and ammonium phosphate 3. Which of the following processes would be accompanied by a decrease in entropy? (multiple choice). Explain your reasoning. a. H20 (s) H20 (g) b. H2O (l) H20 (g) c. H20 (s) H20 (I) d. H20 (g) H20 (s) e. H20 (l, 500 "C) Hizo (I, 75 ec) Calculate AG for the following reaction at 298 K. If the reaction is not spontaneous under standard 298 K, at what temperature would the reaction become spontaneous? 572 AS" 179 J/K

Explanation / Answer

Ans 3. d) H2O (g) = H2O (s)

Entropy is the degree of randomness or disorderness of the system . The molecules of solid are tightly packed , allowing almost no movement , hence it has lowest entropy amongst all physical states.

So a change in the physical state from gas to solid , causes the decrease in entropy of the system , as the molecules of the solid product are more orderly arranged than that of liquid reactants.

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