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If 900 J/g of heat is exchanged at boiling point of water, then what is increase in entropy
Options
(a) 900 J/mol
(b) 87.2 J/mol
(c) 43.4 J/mol
(d) Zero
Correct Answer:
43.4 J/mol
Explanation:
Heat exchanged at boiling point of water
= 900 J/g = 900 x 18 J/mol = 16200.0 J/mol.
ΔS(vap) = ΔH(vap) / T(b) = 16200/ 373 ( therefore T(b) = 273 + 100 = 373 K)
= 43.4 J/mol.
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Topics: Thermodynamics
(179)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If heat of formation of C + O₂ → 2CO is ΔH = -110.5 kcal,then heat of combustion
- 20 g of a non-volatile solute is added to 500 g of solvent. Freezing point
- If 0.2g of an organic compound containing carbon, hydrogen, and oxygen on combustion
- The general molecular formula for a cycloalkyl group is
- The difference between ΔH and ΔE at 300 K for the reaction
Topics: Thermodynamics (179)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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