ThermodynamicsMedium
Question
Which one of the following has ᐃSogreater than zero ?
Options
A.CaO(s) + Co2(g) ⇋ CaCO3(s)
B.NaCl(aq) ⇋ NaCl(s)
C.NaCl3(s) ⇋ Na+(aq) + NO3-(aq)
D.N2(g) + 2H2(g) ⇋ 2NH3(g)
Solution
Entropy (ᐃS) of a reaction is position if the products are imn more random state as compared to reactants.
order of randomess: Gas > Liquid>Solid(i) In (b), product NaCl (Solid)has lesser entropy as compared to NaCl (aq) (Na+ and Cl-) in reactant.
(ii) In (a) Product (solid)has lesser entorpy as compared to reactants.
(iii) In (d), Both reactants and products and products are in gaseous state, but number of moles of products are decreasing.
(iv) In (c) Products are in liquid state hencehigh entropy than reactant which is present in solid state.
order of randomess: Gas > Liquid>Solid(i) In (b), product NaCl (Solid)has lesser entropy as compared to NaCl (aq) (Na+ and Cl-) in reactant.
(ii) In (a) Product (solid)has lesser entorpy as compared to reactants.
(iii) In (d), Both reactants and products and products are in gaseous state, but number of moles of products are decreasing.
(iv) In (c) Products are in liquid state hencehigh entropy than reactant which is present in solid state.
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