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Considering entropy (S) as a thermodynamic parameter, the criterion for the spontaneity of any process is
Options
(a) ΔS system + ΔS surroundings > 0
(b) ΔS system – ΔS surroundings > 0
(c) ΔS system > 0 only
(d) ΔS surroundings > 0 only
Correct Answer:
ΔS system + ΔS surroundings > 0
Explanation:
ΔS = Rln V₂/V₁,
Here the volume of gas increases from V₁ to V₂ at consant temperature T. The total increase in entropy of the system and its surroundings during the spontaneous process of expansion considered above is, thus R ln (V₂/V₁).Since V₂ > V₁, it is obvious that the spontaneous (irreversible) isothermal expansion of a gas is accompanied by a increase in the entropy of the system and its surroundings considered together.
ΔS(sys) + ΔS(surr > 0.
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Topics: Thermodynamics
(179)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Nitration of aniline is achieved by
- If HNO₃ changes into N₂O, the oxidation number is changed by
- The reaction : Ag²⁺(aq) + Ag(s) ⇌ 2Ag⁺(aq) is an example of
- The conductivity of strong electrolyte
- In the titration of strong acid and weak base, the indicator used is
Topics: Thermodynamics (179)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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