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A reaction occurs spontaneously is
Options
(a) TΔS < ΔH and both ΔH and ΔS are +ve
(b) TΔS > ΔH and ΔH is +ve and ΔS is -ve
(c) TΔS > ΔH and both ΔH and ΔS are +ve
(d) TΔS = ΔH and both ΔH and ΔS are +ve
Correct Answer:
TΔS > ΔH and both ΔH and ΔS are +ve
Explanation:
ΔG = ΔH – TΔS .
ΔG = -ve for spontaneous reaction , When ΔS = +ve, ΔH = +ve and TΔS > ΔH ⇒ ΔG = -ve, When randomness favours and energy factor do not favour then spontaneity depends upon the temperature dependent means at high temperature. TΔS > ΔH, ΔG = -ve and reaction is feasible.
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Topics: Thermodynamics
(179)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The s-block element used as a catalyst in the manufacture of Buna-S rubber is
- When the first ionisation energies are plotted against atomic number
- Which of the following is the smallest in size?
- In Ramsay and Rayleigh’s isolation on noble gases from air,the nitrogen of the
- HSO₄⁻ + OH⁻ → SO₄²⁻ + H₂O. which is correct about conjugate acid – base pair
Topics: Thermodynamics (179)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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