Unformatted text preview: tropy? 1. 2 kg of liquid H 2 O 2. 1 kg of solid H 2 O 3. 2 kg of gaseous H 2 O correct 4. 1 kg of liquid H 2 O 5. 1 kg of gaseous H 2 O Explanation: 007 (part 1 of 1) 12 points 257 g of ice at10 . ◦ C is put in 418 g of water at 85.0 ◦ C. All of the ice melts. What is the Fnal temperature of the water? Correct answer: 20 . 3 ◦ C. Explanation: m ice = 257 g T ice =10 . ◦ C m water = 418 g T water = 85 . ◦ C Take the ice and the water to zero degrees. Then see how much heat is left over (the Joules of heat from the hot water heats and melts all of the ice AND there will be heat left over). All the ice melts with 91209 . 3 J. All the hot water will cool to zero with 148658 J. The di±erence is 57448 . 2 J. Now use the excess joules to heat the 675 g of water and get 20 . 3 ◦ C....
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 Spring '07
 Fakhreddine/Lyon
 Chemistry, Thermodynamics, Enthalpy, Reaction, Energy, Entropy, kJ/mol

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