Question

part b
consider part a. based on the student data, the prediction was correct.
remember, heat is the transfer of energy from the high temperature object to
the low temperature object until equilibrium is met and that was what
happened in this case. how did this transfer of energy occur at the molecular
level?

a heat is transferred from one object to another object
through particle collisions. the hot water had the
greatest kinetic energy. particle collisions transferred
that energy from the hot water, to the can, and then to
the cooler water.

b temperature changes due the transfer of heat energy.
the hot water had the greatest heat energy. heat was
transferred from the inside of the can to the outside of
the can, or into the water held in the styrofoam cup.

c heat energy always travels from high to low. the heat
energy flowed through the water in the can, through the
metal since it is a good conductor, and then out into the
cooler water, raising the temperature there.

d because the hot water had the highest temperature, it
also had the greatest stored or potential energy. that
energy was shared with the cooler water until the two
volumes were at the same temperature.

Explanation:

To determine the correct answer, we analyze each option:

• Option A: Heat transfer at the molecular level occurs via particle collisions. Hot water has higher kinetic energy (faster - moving molecules). When these molecules collide with the molecules of the can (and then the cooler water molecules), energy is transferred. This accurately describes molecular - level heat transfer.
• Option B: This option talks about heat transfer in terms of the can's inside and outside but does not address the molecular - level mechanism of how energy is transferred between particles.
• Option C: This option focuses on the macroscopic path of heat flow (through water, metal, and to cooler water) rather than the molecular - level collisions that cause the transfer.
• Option D: Temperature is related to kinetic energy, not potential energy. Hot water has higher kinetic energy, not potential energy, so this option has a fundamental error.

Answer:

A. Heat is transferred from one object to another object through particle collisions. The hot water had the greatest kinetic energy. Particle collisions transferred that energy from the hot water, to the can, and then to the cooler water.