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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 velocity of image when object and mirror both are moving towards each other
- Two lenses of power 15 D and -3 D are placed in contact.
- A change of 0.04 V takes place between the base and the emitter when an input
- The ionisation potential of hydrogen-atom is -13.6 eV. An electron in the groundstate
- A source and an observer approach each other with same velocity 50 m/s. If the frequency
Topics: Thermodynamics (179)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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