Question

8. Without resorting to tables, state whether Sincreases, decreases or remains approximately the same for the following reactions/processes, and explain your rationale (check to make sure the equations are balanced, when relevant): a) H20 (1) H2O (g) b) 12 (g) + Cl2 (g) → 2 ICI (g) c) CO2 (g) → CO2 (s) d) raw egg → hard boiled egg e) mowing the lawn f) Ni(s) + 4 CO2(g) → Ni(CO)4(0) g) 2 Fe(CO):(1) ► Fe2(CO),(s) + CO(g) h) P4 (g) + 10 F2 (g) → 4 PFs (g) i) BF3 (g) + NH3(g) → H3NBF3 (g) j) Fe,O3(s) + Al(s) → Fe(s) + Al2O3(s) k) CaCl(s) + 6H20(1) Ca(H2O).]C12(s) 1) C.H.2(1) + 902(g) → 6CO2(g) + 6H2O(g) m) H2O(g) + CO(g) → H2(g) + CO2(g) n) 2000 ethelyne (g) → polyethylene plastic (s)

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Answer 1

The main concept envolved is that, entropy(S) is the measure of randomness or disorder in a system.Also randomness is most in gases and least in solid .If the number of gas molecules increases in the reaction then entropy will increase.

I el H₂O W → H2O (9) No. of gas molecube increased .:. 's increases 16) 12 (9) 1 (l(9) → 2 CI lg). 1u this case the change of entropy is. I negligible © (02G) → (07 (5) * No. of gas molecules decreased & '3 decreased. (d) raw egg - hard boiled egg - In this case although saw egg is liquid and hard boiled egg is solid, but still entury will increase. It is due to the protein structure of boiled egg. Due to the protein structure it's entropy will increase mowing the lawn .. the entropy will increase , brause we are cutting the grass into pieces. Nils) † 4602 () NOCO y C). : No of gas molecules decreased :. 's' decreased is 9 2 Fe (oko Fez (10) g(s) + (09) & will increase as gas molecules increased 1 -

(1) Pu (g) + 10 F2 (g) - 4.PPs. G Nova 5 deerearles i BP 3 (g) * NM3 (9) M₂N BF3 G ) → deescales : 0 Fey 03 (s) + A16) ► Fe (8) + A1203 (s) - 185 is negligible, . 1(k) Calla(s) + 6H₂0 W - [Caledo] c, G) - As no. of liquid molecuulis decreased 5 decreased (1) COMI2 (1) + 902 (9) 6 (02 (9) + 8 H20 G) i 's increases (as) H₂O 9) + Cog H2 (9) + CO2 (g) - '85 is negligible (m) 2000 ethelene (9) - polyethylene plastic (5) → decreases