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When 1 kg of ice at 0⁰C melts to water at 0⁰C, the resulting change in its entropy, taking latent heat of ice to be 80 cal/⁰C, is
Options
(a) 273 cal/K
(b) 8 x 104 cal/K
(c) 80 cal/K
(d) 293 cal/K
Correct Answer:
293 cal/K
Explanation:
Change in entropy is given by
dS = dQ / T or ∆S = ∆Q / T = mLf / 273
∆S = 1000 x 80 / 273 = 293cal / K
Related Questions: - A galvanometer of 50 Ω resistance has 25 divisions. A current of 4×10⁻⁴ A gives
- Light of frequency 8×10¹⁵ Hz is incident on a substance of photoelectric work
- In an inductor when current changes from 2 A to 18 A in 0.05 sec, the e.m.f. induced
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Topics: Thermodynamics
(179)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A galvanometer of 50 Ω resistance has 25 divisions. A current of 4×10⁻⁴ A gives
- Light of frequency 8×10¹⁵ Hz is incident on a substance of photoelectric work
- In an inductor when current changes from 2 A to 18 A in 0.05 sec, the e.m.f. induced
- The drive shaft of an automobile rotates at 3600 rpm and transmits 80 HP
- The magnetic moment has dimensions of
Topics: Thermodynamics (179)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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