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Assumeideal gas behaviour for all the gasconsidered &vibrationaldegreesof freedomto be active. Separatedequimolar sampleof He, H_(2), SO_(2) & CH_(4) weresubjectedto atwo stepprocess as mentioned. Initially all areat samestate of tempreature&prssure.Step-ItoAll undergo reversible adiabaticexpansion to attainsamefinal volume, which is doublethe original volume thereby causingthe decreases in their temperature .Step -II toAfterstep I allare given appropriate amount of heatisochoricallyto restore the Mark the correct option(s). |
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Answer» Due to step -I only, thedecrease in thetempreaturewill be maximumfor `CH_(4)` `because DelatE= 0 ` for all `because` (C) is correct Also`because|W|` ismaximum for `CH_(4)` is stepI & OVERALL `DeltaE =0 because |q|` for `CH_(4)` will be maximum `because` option(B) is correct Sinceafterstep I, all havesame volume , same MOLES &PRESSURE of `CH_(4)`is highest `because`Temperatureof `CH_(4)`will be highest& sinceinitialit issame `because` decrease in temperaturewill beleast `because` option (A) is incorrect `because gamma ` for the `SO_(2)`& `CH_(4)`is different (due tovibrational degree of freedom ) `because` graphis different `because` option (D) is incorrect `because` option (B), (C) 
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