Heat and Thermodynamics 1 Question 2
2. A thermally insulated vessel contains of water at . Then, the air from the vessel is pumped out adiabatically. A fraction of water turns into ice and the rest evaporates at itself. The mass of evaporated water will be closest to
(Latent heat of vaporisation of water
(2019 Main, 8 April I)
(a)
(b)
(c)
(d)
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Solution:
- Let
grams of water is evaporated.
According to the principle of calorimetry,
Heat lost by freezing water (that turns into ice)