Can u please explain for me and for questions 3 if it increases in entropy what

Question

Can u please explain for me and for questions 3 if it increases in entropy what is the answer ? 3. Which chemical change listed below represents a decrease in entropy b. c. d, CaCO3(s) CaO(s) + CO2(g) 2 C6H6(1) + 15 O2(g) 12 CO2(g) + 6 H2O(g) 2 NO2(g) N2(1) + 2 02(1)' N2(1) + 3 H2(1) NH3(g) 2 NaCl(1) 2 Na(1) + Cl2(g) and if it incereopc 4. Calculate AFHo at 25°C for the reaction below. 2ZnS(s) -205.6 3 2ZnO(s) -348.3 + O2(g) 0 25O2(g) -296.8 + AH (kJ/mol) a. -257.1 kJ b. -582.2 kJ c. +257.1 kJ d. -879.0 kJ e. +879.0 kJ

Explanation / Answer

3. Entropy is a measure of disorder. Increasing entropy generally means that things become less regular.

A solid is generally a very regular, repetitive assortment of atoms and molecules, which are locked in place. Melting that solid to a liquid allows the atoms and molecules to slide past one another, so they're not in that nice, regular arrangement, but the forces between them hold everything more or less in place. Vaporizing that liquid into a gas allows the atoms and molecules to overcome the forces between them, which results in the least amount of order. All of these represent increases in entropy.

So, any phase change which goes in the opposite direction decreases the entropy of the material.

so decrease in entropy will be in (C).

and increase in entropy will be in (A),(B),(D),(E).

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