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A 20 cube of ice, initially at a temperature of -5°, is put into some water in a Styrofoam cup. The initial temperature of the water is 50°, and the ice absorbs 5 of heat before reaching thermal equilibrium with the water. Assuming that the ice absorbs this heat only from the water, and that the Styrofoam cup has negligible thermal capacity, what final temperature does the mixture reach? Latent heat of fusion for ice =3.33×10⁵W⁻¹ a) 60° b) 119° c) 0° d) 55° e) 27°
Sagot :
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