| State whether each of the
following systems are in thermal equilibrium, chemical equilibrium, phase equilibrium or mechanical equilibrium. |
| Give all the correct answers for each system. a.)
snow resting on the roof of my house on a very cold day, b.) a cup of coffee sitting on my
desk, c.) a bicycle
rolling along a level road, d.) a river flowing past your city. |
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| Read: |
Not much to say here. |
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| Given: |
a.) |
Snow |
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c.) |
Bike |
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b.) |
Coffee |
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d.) |
River |
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| Find: |
Is each system in thermal equilibrium, chemical equilibrium, phase equilibrium or mechanical equilibrium? |
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| Assumptions: |
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| Equations
/ Data / Solve: |
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| Answers: |
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Thermal |
Chemical |
Phase |
Mechanical |
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| a.) |
Snow |
No |
Yes |
No |
Yes |
The snow is melting
due to heat transfer from my roof and may also be sublimating. |
| b.) |
Coffee |
No |
Yes |
No |
Yes |
Water and oils are
evaporating while heat is being transferred to the surroundings. |
| c.) |
Bike |
Yes |
Yes |
Yes |
No |
Unbalanced forces
cause the bike to roll. |
| d.) |
River |
No |
Yes |
No |
No |
The water is absorbing
heat and evaporating. |
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