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27.07.2021 •
Chemistry
Calculate the heat change in calories for melting of 0.30 kg of water at 0*C. The
heat of fusion for water is 80 cal/g. The heat of vaporization of water is 540 cal/g.
The specific heat capacity of water is 1.00 cal/g*C.
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Ответ:
24 kcal
Explanation:
Given
Mass of water![m=0.3\ kg](/tpl/images/1400/1499/cb247.png)
Temperature of water![T_1=0^{\circ}](/tpl/images/1400/1499/ac8c2.png)
Heat of fusion![L_f=80\ cal/g](/tpl/images/1400/1499/fbdfa.png)
Heat of vaporization![L_v=540\ cal/g](/tpl/images/1400/1499/f5481.png)
Specific heat of water![c=1\ cal/g.^{\circ}C](/tpl/images/1400/1499/23ddf.png)
Heat require to melt the ice is
Thus, 24 kcal of heat is required to melt 0.3 kg of ice.
Ответ: