H12- Thermo 1-problems

# H12- Thermo 1-problems - goldstein(ddg625 H12 Thermo 1...

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goldstein (ddg625) – H12: Thermo 1 – mccord – (50970) 1 This print-out should have 19 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points On January 1, 2001, a bookstore had 266,478 books in stock. On February 1, 2001, the same bookstore had 257,814 books in stock. What is the value of Δ(books) for the bookstore during that period? Answer in units of books. 002 10.0 points Work is 1. organized molecular motion. 2. heat. 3. potential energy. 4. chaotic molecular motion. 5. kinetic energy. 003 10.0 points A chemical reaction takes place in a container of cross-sectional area 100 cm 2 . As a result of the reaction, a piston is pushed out through 20 cm against an external pressure of 509 torr. What is the value for w for this reaction? (Sign does matter.) Answer in units of J. 004 10.0 points A 100 W electric heater (1 W = 1 J / s) oper- ates for 14 min to heat the gas in a cylinder. At the same time, the gas expands from 5 L to 18 L against a constant atmospheric pressure of 3 . 64 atm. What is the change in internal energy of the gas? Answer in units of kJ. 005 10.0 points A system had 150 kJ of work done on it and its internal energy increased by 60 kJ. How much energy did the system gain or lose as heat? 1. The system gained 90 kJ of energy as heat. 2. The system gained 60 kJ of energy as heat. 3. The system lost 210 kJ of energy as heat. 4. The system gained 210 kJ of energy as heat.

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