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Manipal MET2012ChemistryThermodynamics (C)

aligned S _ (rhombic) + O ₂( ~g ) SO ₂( ~g ), H=-297.5 ~kJ ~S _ (monoclinic) + O ₂( ~g ) SO ₂( ~g ), H=-300 ~kJ aligned The data can predict that

Options

  1. Arhombic sulphur is yellow in colour
  2. Bmonoclinic sulphur has metallic lusture
  3. Cmonoclinic sulphur is more stable
  4. DH_ transition of S _R to S _M is endothermic

Correct answer

D. H_ transition of S _R to S _M is endothermic

Step-by-step solution

Substracting equation (II) from (I), we get S _R ~S _M, H=+2.5 ~kJ Thus, S _R to S _M transition is an endothermic reaction.

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