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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
- The wavelength of the matter wave is independent of
- The decay constant of a radio isotope is λ. If A₁ and A₂ are its activities at time
- If an electron in a hydrogen atom jumps from the 3rd orbit to the 2nd orbit, it emits
- In a n-p-n transistor about 10¹⁰ electrons enter the emitter in 2 μs,
- Four identical cells of emf Ԑ and internal resistance r are to be connected in series.
Topics: Thermodynamics (179)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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