Homework 5_ Thermodynamics I

Homework 5_ Thermodynamics I - ekarika(ufe56 Homework 5...

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ekarika (ufe56) – Homework 5: Thermodynamics I – Shear – (52375) 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page – Fnd all choices before answering. 001 10.0 points A closed system can exchange energy with the surroundings. 1. ±alse 2. True 002 10.0 points Which of the following statements is true about an exothermic reaction? 1. The change in enthalpy is positive. 2. The energy of the products is higher than that of the reactants. 3. We can determine the absolute heat con- tent of the products and reactants. 4. Heat is evolved during the reaction. 003 10.0 points What is true about the Frst law of thermody- namics? 1. Δ E sys > 0 2. Δ E sys < 0 3. Δ E univ < 0 4. Δ E sys = 0 5. Δ E univ = 0 6. Δ E univ > 0 004 10.0 points Consider the following speciFc heats: copper, 0.384 J/g · C; lead, 0.159 J/g · C; water, 4.18 J/g · C; glass, 0.502 J/g · C. Which substance, once warmed, would be more likely to main-
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This note was uploaded on 05/04/2010 for the course ECO 304K taught by Professor Hickenbottom during the Spring '10 term at University of Texas.

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Homework 5_ Thermodynamics I - ekarika(ufe56 Homework 5...

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