If 8000 cal of heat is needed to change the temperature of a certain amount of ice at -250C to steam at 1350C, determine the mass of the ice. The specific heat of ice is 0.50 cal/g C0 while its heat of fusion is 80 cal/g. The specific heat of steam is 0.46 cal/g C0 while its heat of vaporization is 540 cal/g.
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