MEDIUMMCQ SINGLEJEE Advanced ChemistryPhysical ChemistryThermodynamics and ThermochemistryPrevious Year Questions
For the reaction, 2Cl(g) → Cl₂(g), the correct option is (NEET 2020)
A.∆rH > 0 and ∆rS > 0 (b) ∆rH > 0 and ∆rS < 0
C.∆rH < 0 and ∆rS > 0 (d) ∆rH < 0 and ∆rS < 0
Explanation
In the reaction, 2Cl(g) →Cl₂(g), the randomness decreases as 2 moles of Cl(g) are converted to 1 mole of Cl₂(g), thus, ∆rS < 0. And this is an exothermic reaction, thus, ∆rH < 0.
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