Physics
200 g of ice at 0° C converts into water at 0° C in 1 minute when heat is supplied to it at a constant rate. In how much time, 200 g of water at 0° C will change to 20° C? Take specific latent heat of ice = 336 J g-1.
Calorimetry
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Answer
Given,
mi = 200 g
mw = 200 g
Time for ice to melt (t1) = 1 min = 60 s
Change in temperature of water (Δt) = 20° C
specific latent heat of ice = 336 J g-1
Rate of heat exchange is constant.
Therefore, power required for converting ice to water = power required to increase the temperature of water.
Hence, time taken = 15 s
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