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A thermally insulated vessel contains some water at $0^{0} C$ . The vessel is connected to a vacuum pump to pump out water vapour. This results in some water getting frozen. It is given Latent heat of vaporization of water at $0^{0} C = 21 \times 10^{5} J / k g$ and latent heat of freezing of water $= 3.36 \times 10^{5} J / k g$ . The maximum percentage amount of water that will be solidified in this manner will be

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answer is 86.2.

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Detailed Solution

Let the total amount be = 100 unit
Let m solidity
$m \times L_{f} = (100 - m) L_{V}$
m = 86.2

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