If "W" is positive, work is done ________ the system.
by
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20
A gas in a closed container is heated with 125 J of energy, causing the lid of the container to rise. If the change in energy of the system is 50 J, how much work was done by the system?
75 J
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10
What is constant in an isolated system?
energy
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15
What are the two ways to transfer energy between a closed system and surroundings?
work and heat
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heart
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gift
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lifesaver
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5
How do you find the change in internal energy?
final internal energy subtract initial internal energy
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15
If heat leaves the system, then the internal energy of the system ______.
decreases
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5
What does âU represent?
The change in internal energy
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5
What is outside the system?
surroundings
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fairy
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lifesaver
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thief
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5
What is represented by "w" in the first law of thermodynamics?
work
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10
If "Q" is negative, heat ________ the system.
leaves
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15
What is the equation for the first law of thermodynamics?
ÎU= q+w
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5
What is the unit used to measure heat?
joules
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20
The internal energy is defined as the amount of all ____ and ____ energies of the particles in a system.
