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Thermal Physics

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4 Jan 2008 16:46:34 IST

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Calorimetry

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A thermally isolated vessel contains 100 g of water at 0° C. When air above the water is pumped out, some of the water freezes and some evaporate at 0° C itself. Calculate the mass of the ice formed if no water is left in the vessel. (Latent heat of vaporization of water = 2.10 × 10⁶ J/kg and latent heat of fusion of ice = 3.36 × 10⁶ J/kg).

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svj 29

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Joined: 27 Dec 2007

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4 Jan 2008 16:52:46 IST

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is the ansr 55.56....???? if ys dn tell, i'll post u d soln....

svj 29

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4 Jan 2008 16:54:17 IST

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the values of latent heat of vapourization is wrong........!!!
is the value of this given in the question.???

svj 29

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4 Jan 2008 16:58:49 IST

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anywy i'll tell u d method to find the ansr:
the amount of ice will be formed more the heat will be released...
this heat will 1st increase the temperature of water to 100degree C. and then this energy will also be utilzed in vapourization so ur eqn will be frmd as such:

x(mass of ice frmd) into latent heat of formation of ice=

(100-m)ST(to raise the temp to 100)+(100-x)into latent heat of vapourization....

rakhi agrawal

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10 Jan 2008 19:07:04 IST

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@svj29
what is
1) x,
2)m
3) ST?

svj 29

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Joined: 27 Dec 2007

Posts: 822

10 Jan 2008 19:34:45 IST

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sry...x=m and x=mass of ice frmd
S=Specific heat
T=temperature change..

rakhi agrawal

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Joined: 7 Dec 2007

Posts: 211

10 Jan 2008 19:40:21 IST

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thanks.now it is clear.

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