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For an experiment, you place 15 g of ice with a temperature of -10 C into a cup and label

AYou also place 25 g of ice at the same temperature into another cup and label it
BWhich of the following statements is true?
AThe average kinetic energy of the ice in cup A is less than that in cup
B

B)The average kinetic energy of the ice in cup A is greater than that cup in

B

C)The average kinetic energy of the ice cup A is equal to that in cup

B

D)The average kinetic energies of the ice in cup A and the ice in cup B are not comparable.

Verified Answer :

The correct answer is c. Temperature is the average kinetic energy of a sample so if two samples have the same temperature they will also have the same average kinetic energy. I hope this helps. Let me know if anything is unclear.

Average kinetic energy is given by the formula:

KE(average) = 3/2kT

where k = Boltzmann constant = 1.38*10⁻²³ J/K

T = temperature in Kelvin (K)

Thus, the average KE is dependent only on temperature and independent of mass.

Since the temp in Cup A and B remains the same, the average KE will also be the same.

Ans C)


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