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Unformatted text preview: wetsel (zpw67) Post-lab 2 Enthalpy lyon (51900) 1 This print-out should have 16 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points Which of the following would experience the smallest increase in temperature if 1 kJ of heat were added to it? 1. 10 g of copper metal 2. 1 g of water 3. 1 g of copper metal 4. 10 g of water 002 10.0 points The substances in their standard states can be found in the appendix of your chemistry text. Remember, the standard state of an element is the state of that element under standard conditions of pressure and temperature. Which of the following reactions is an en- thalpy of formation reaction? 1. C diamond (s) + 2H 2 (g) CH 4 (g) 2. CH 4 (g) + 2O 2 (g) CO 2 (g) + 2H 2 O 3. Hg(s) + 1 / 2O 2 (g) HgO(s) 4. 2Fe(s) + 3 / 2O 2 (g) Fe 2 O 3 (s) 003 10.0 points Solve to the correct number of sig. figs. An aluminum plate weighing 100.0 g is heated to 105 . C and is then laid on top of a copper plate weighing 100.0 g at 0 . C in an insulating container. If the container al- lows no heat to escape and absorbs no heat itself, what will the final temperature of the two metal plates be? Report your answer to the nearest 0.1 degree. (Simplifying hint: T calculations give the same result whether they are done in Celsius or Kelvins, so do this problem with the tem- peratures in degrees Celsius. Even though the T in this problem is broken up into ini- tial and final temperatures, it is still a T...
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This note was uploaded on 07/18/2011 for the course CH 204 taught by Professor Leytner during the Spring '08 term at University of Texas at Austin.
- Spring '08