For which of these process(es) will the entropy of the system increase? A 100 gr

Question

For which of these process(es) will the entropy of the system increase? A 100 gram sample of solid co_2 (dry ice) sublimes. Silver bromide precipitates from a solution containing Ag^+ and Br^- ions. Compressing one mole of N_2 gas at a constant temperature. Mg(s) + CI_2(g) rightarrow MgCI_2(s) delta H = -641.8 kj 2 H_2O (I) rightarrow H_2(g) + O_2(g) delta H = 476 kj 4 1 and 5 3 and 4 1 and 4 2 and 5 For which of these process(es) will the entropy of the surroundings increase? A 100 gram sample of solid co_2 (dry ice) sublimes. When solid potassium bromide is dissolved in water, the solution gets colder. Water condenses on a cold pipe. Mg (s) + Cl_2(g) rightarrow MgCl_2(s) delta H =-641.8 KJ 2 H_2O (l) 2 H_2(g) + O_2 (g) delta H = 476 KJ 1 and 5 2 and 4 3 and 4 1 and 2 1, 2, and 5

Explanation / Answer

(18) Entropy is themeasure of disorderness. As the disorderness increases the entropy also increases.

Hecne (b) 1 and 5.

1. solids to gas . we know that gases move randomly in all directions but not solids.

5. liquid substance gets decomposed to gas substances. hence entropy increases in these two case.

(19) (c) 3 and 4

3. when water condenses it loses energy to surrondings which increases the entropy of surroundings.

5. This reaction is exothermic, gives energy to surroundings which increase the entropy of surroundings.

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