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QUIZ 13 Nota means none of the above. |
| 1.The lowest theoretical temperature is |
| a. 0 degrees C |
| b. 7 K |
| c. - 273 degrees C |
| d. nota |
| 2. 0 K is equal to |
| a. 273 degrees C |
| b. -273 degreese C |
| c. 0 degrees C |
| d nota |
| 3. Helium has the special property that its internal energy is directly proportional the average kinetic energy of the molecules. Hence helium is directly proportional to its temperature. Consider a flask of helium with a temperature of 20 oC. If the helium heated until it has twice the internal energy, what is he final temperature |
| a. 40 oC |
| b. 40 K |
| c. 586 K |
| d. nota |
| 4. If 200 J of heat is added to a gas system than does no external work, what is the change in internal energy of the system? |
| a. 200 J |
| b. 100 J |
| c. -200 J |
| d. nota |
| 5. If 200 J of heat is added to a gas system than does 100 J external work, what is the change in internal energy of the system? |
| a. 200 J |
| b. 100 J |
| c. -200 J |
| d. nota |
| 6. During a certain thermodynamic process, a sample of gas expand and cools, reducing it s internal energy by 4000 J. No heat is added or taken away during the process. How much work is done by the sample? |
| a. 4000 J |
| b. -4000 J |
| c. 0 J |
| d. nota |
| 7. What is the ideal efficiency of an automobile engine in which the fuel is heated to 2900 K and the outdoor air is 290 K? |
| a.0.1 |
| b.0.9 |
| c. nota |