Answer: Q Average Kinetic Energy is asking about one molecule. On average
each molecule in Box Q has a higher temperature so it’s moving faster!
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Answer: A Note that temperature needs to be in Kelvin when calculating
kinetic energy and thermal energy so a 50 degree temp change is not much
compared to 5 times the mass.
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C Sample 1 has more atoms so it must have less kinetic energy per atom for the total
energy to add up the same as Sample 2.
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See ‘Gas Properties’ PhET simulation.
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Answer: E because Hydrogen is the lightest molecule on the list. If all of these gasses
have the same temperature, then the lightest one will have the highest speed.
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D. Technically Kelvin since the expansion coefficients are in Kelvin However, delta T
or change in Temperature. The change in Kelvin and Celsius are equal.
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11.900 x 12x10-6 (263-323) = -0.0086 m
11.900 – 0.0066 = 11.891
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B. From the table you can see that aluminum expands more with temperature
increases than iron. We need the rod to shrink more than the iron ring or we need
the iron ring to expand more than the aluminum rod. Since aluminum responds
more, we cool them both and the rod shrinks more.
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B. From the table you can see that aluminum expands more with temperature
increases than iron. We need the rod to shrink more than the iron ring or we need
the iron ring to expand more than the aluminum rod. Since aluminum responds
more, we cool them both and the rod shrinks more.
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See PhET sim States of Matter
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