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At 0⁰C, 15 gm of ice melts to form water at 0⁰C. The change in entropy is
Options
(a) zero
(b) 18.5
(c) 15
(d) None of these
Correct Answer:
18.5
Explanation:
Heat absorbed = mL cal. = mL J joule
Change of entropy ∆S = Heat/Temperature
∆S = mLJ / Temperature = (15×80×4.2) / 273
∆S = 18.46 J/K.
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Topics: Thermodynamics
(179)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A disc of radius 0.1 m is rotating with a frequency 10 rev/sec in a normal magnetic
- If the force exerted by an electric dipole on a charge q at a distance of 1 m is F
- Three resistances P,Q,R each of 2Ω and an unknown resistances S form the four arms
- The internal energy change in a system that has absorbed 2 kcals of heat
- A perfect gas at 27° C is heated at constant pressure to 327° C. If original volume of gas
Topics: Thermodynamics (179)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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