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AIIMS2003ChemistryThermodynamics (C)

Which one of the following has S^ greater than zero?

Options

  1. ACaO (s)+ CO ₂(g) CaCO ₃(s)
  2. BNaCl _ (a q) NaCl _ (s)
  3. CNaNO _ 3(s) Na _ (a q) ⁺+ NO ₃⁻ _ (a q)
  4. DN _ 2(g) +3 H _ 2( ~g ) 2 NH _ 3(g)

Correct answer

C. NaNO _ 3(s) Na _ (a q) ⁺+ NO ₃⁻ _ (a q)

Step-by-step solution

Here, the number of product species is greater than the number of reactant species. So it leads to positive value of entropy.

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