Asked by Courtney
Which of the following is an example of something not allowed by the second law of thermodynamics? Indicate true or false.
1.All refrigerators can be made perfect
2.A spoon in a hot drink spontaneously stirring the drink
3.All the molecules suddenly moving to one place in a room
4.A perfect refrigerator
Moving heat from a cold place to a hotter place with the use of some work
1.All refrigerators can be made perfect
2.A spoon in a hot drink spontaneously stirring the drink
3.All the molecules suddenly moving to one place in a room
4.A perfect refrigerator
Moving heat from a cold place to a hotter place with the use of some work
Answers
Answered by
Courtney
Nevermind I got it =]
Answered by
drwls
II'm not sure what is meant by a "perfect" refrigerator. It is possible to have a refrigerator what does not require work. The use an external heat source. See
http://www.dometicusa.com/refrigerators.php
Stirring a cup requires energy, and wuld violate the first law.
Molecules CAN gather in part of a room, but the probability is infinitesimal.
http://www.dometicusa.com/refrigerators.php
Stirring a cup requires energy, and wuld violate the first law.
Molecules CAN gather in part of a room, but the probability is infinitesimal.
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