Chemistry - Thermodynamics - II Question with Solution | TestHub
ChemistryThermodynamics - IICalculation of DSHard2 minQB
ChemistryHardsingle choice
Two copper blocks of heat capacities C and 2C are at temperatures T₁ and T₂ respectively. They are brought into contact and allowed to attain thermal equilibrium in an insulated enclosure. The entropy change of the system is
Options:
Answer:
B
Solution:
Final temperature Tf = (C·T₁ + 2C·T₂)/(3C) = (T₁ + 2T₂)/3. ΔS = C ln(Tf/T₁) + 2C ln(Tf/T₂) = C ln[Tf³/(T₁T₂²)] = C ln[(T₁+2T₂)³/(27T₁T₂²)]. Matches (b).
Stream:JEESubject:ChemistryTopic:Thermodynamics - IISubtopic:Calculation of DS
⏱ 2mℹ️ Source: QB
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