Chemistry - Thermodynamics - I Question with Solution | TestHub
ChemistryThermodynamics - IIsothermal Process/Isobaric/IsochoricMedium2 minQB
ChemistryMediumnumerical
A quantity of 8 g oxygen gas is expanded isothermally at 27°C from 2 dm³ to 8 dm³ at a constant external pressure of 4 bar. If the magnitude of work done in this process is used in lifting body of mass 40 kg, the height (in meter) up to which the body can be lifted is (g = 10 ms⁻²)
Answer:
6.00
Solution:
Irreversible expansion against constant Pext: W = Pext(V₂ − V₁) = 4×10⁵ Pa × (8 − 2)×10⁻³ m³ = 2400 J. (Isothermal at 27°C fixes only the final equilibrium state; the external pressure sets the work.) Then mgh = 2400 ⇒ h = 2400/(40 × 10) = 6 m.
Stream:JEESubject:ChemistryTopic:Thermodynamics - ISubtopic:Isothermal Process/Isobaric/Isochoric
⏱ 2mℹ️ Source: QB
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