A thermally insulated vessel contains 150 g of water at 0°C.

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asked Sep 12 in Science by priya12 (-12,583 points)

A thermally insulated vessel contains 150 g of water at 0°C. Then the air from the vessel is pumped out adiabatically. A fraction of water turns into ice and the rest evaporates at 0°C itself. The mass of evaporated water will be closest to – (Latent heat of vaporization of water = 2.10 x 106 Jkg–1 and Latent heat of fusion of water = 3.36 x 105 J kg–1 )

 (1) 130 g 

 (2) 35 g 

  (3) 150 g 

  (4) 20 g

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1 Answer

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answered Sep 12 by navnit40 (-4,766 points)

Correct option (4) 20 g

 Explanation:

m(2.10 × 106) = (150 – m) (3.36 × 105)

21m/3.36 + m = 150

= m = (3.36 × 150)/24.36 = 20 g

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