problem17_p104

University Physics with Modern Physics with Mastering Physics (11th Edition)

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17.104: a) The three possible final states are ice at a temperature below C, 0 . 0 ° an ice- water mixture at C 0 . 0 ° or water at a temperature above C. 0 . 0 ° To make an educated guess at the final possibility, note that ) C K)(15.0 kg J kg)(2100 140 . 0 ( ° kJ 4.41 = are needed to heat the ice to C, 0 . 0 ° and ) C K)(35.0 kg J kg)(4190 (0.190 ° kJ 27.9 = must removed to cool the water to C, 0 . 0 ° so the water will not freeze. Melting all of the ice would require an additional kJ, 46.8 kg) J 10 kg)(334 140 . 0 ( 3 = × so some of the ice melts but not all; the final temperature of the system is
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Unformatted text preview: C. . ° Considering the other possibilities would lead to contradictions, as either water at a temperature below freezing or ice at a temperature above freezing. b) The ice will absorb 27.9 kJ of heat energy to cool the water to C. ° Then, 070 . kg J 10 334 ) kJ 41 . 4 kJ 9 . 27 ( 3 = = ×-m kg will be converted to water. There will be 0.070 kg of ice and 0.260 kg of water....
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This document was uploaded on 02/05/2008.

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