Without resorting to tables, state whether S increases, decreases or remains app

Question

Without resorting to tables, state whether S increases, 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) H2O (l) 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(1) g) 2 Fe(CO)5(1) Fe2(CO)9(s) + CO(g) h) P4 (g) + 10 F2 (g) 4 PFs (g) i) BF3 (g) + NH3 (g) H3NBF3 (g) j) Fe2O3(s) + Al(s) Fe(s) + Al,03 (s) k) CaCL(s) + 6H20(I) [Ca(H2O)6]CL(s) l) C6H12(I) + 90-(g) 6CO2(g) + 6H20(g) m) H2O(g) + CO(g) H2(g) + CO2(g) n) 2000 ethelyne (g) polyethylene plastic (s)

Explanation / Answer

(a) Entropy will increase as 1 mol of liquid is converted to 1 mol of gas.

(b) Entropy remains same as 2 moles of reactants produce 2 moles of products.

(c) Entropy will decrease as gaseous molecules are converted to solid.

(d) Entropy remains same.

(e) Entropy will increase.

(f) As gaseous molecules are converted to liquid, entropy will decrease.

(g) As liquid molecules converted to gas, entropy increases.

(h) 11 moles of gas converted to 4 moles of gas, so entropy decreases.

(i) 2 moles of gas converted to 1 mole of gas, so entropy decreases.

(j) Entropy remains same.

(k) As liquid molecule converted to solid, entropy decreases.

(l) 9 moles of gas converted to 12 moles of gas, so entropy increases.

(m) Entropy remains same.

(n) Entropy decreases.

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