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A tube leads from a flask in which water...

A tube leads from a flask in which water is boiling under atmospheric pressure to a calorimeter. The mass of the calorimeter is 150 g, its specific heat capacity is `0.1 cal//g//^@C`, and it contains originally 340g of water at `15^@C`. Steam is allowed to condense in the colorimeter until its temperature increases to `71^@C`, after which total mass of calorimeter and contents are found to be 525g. Compute the heat of condensation of steam.

Text Solution

Verified by Experts

Mass of calorimeter and contents before passing steam
`=(150+340)=490g`
mass after passing steam`=525g`
`implies`mass of steam which condenses`=(525-490)g=35g`
Let L`=` latent heat of steam.
Heat lost by steam`=`heat gained by water`+`heat gained by calorimeter
`35L+35xx1(100-71)=340xx1xx(71-15)+150`
`xx0.1xx(71-15)`
`implies=539 cal//g`
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