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In which of the following conditions a chemical reaction can not occur
Options
(a) ΔH and ΔS increase and TΔS > ΔH
(b) ΔH and ΔS decrease and ΔH > TΔS
(c) ΔH increases and ΔS increases
(d) ΔH decreases and ΔS increases
Correct Answer:
ΔH increases and ΔS increases
Explanation:
(i)When ΔH and ΔS increase, then , if TΔS > ΔH the reaction is spontaneous.
Therefore ΔG = ΔH – TΔS = -ve.
(ii)When ΔH and ΔS decrease,then if ΔH > TΔS. This makes ΔG is -ve and process is spontaneous.
(iii) If , ΔH increases and ΔS decreases, then ΔG is +ve and process is non-spontaneous.
(iv) If ΔH decrease and ΔS increases, then ΔG is -ve and process is spontaneous.
Related Questions: - If a mixture of CO and N₂ in equal amount have total 1 atm pressure
- Among the following, identify the compound which cannot act as both oxidising
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Topics: Thermodynamics
(179)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If a mixture of CO and N₂ in equal amount have total 1 atm pressure
- Among the following, identify the compound which cannot act as both oxidising
- Which of the following oxides is used in lead storage battery
- The total number of isomeric alcohols with the molecular formula C₄H₉OH is
- In the manufacture of ethanol from starch by fermentation,
Topics: Thermodynamics (179)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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