A)its temperature changes
B)it may change phase
C)thermal energy has been transfered into or out of the substance
D)all of these
2006-11-16 20:00:24 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Physics
The answer should be A.
Average kinetic energy of a substance is related to the speed of the particles moving in it and the temperature of the substance.
As the particles in the a substance moves faster, the average kinetic energy of the substance increases. So does the temperature.
When a substance changes phase, the temperature will remain constant. This means that the average kinetic energy is also constant during this process. Hence, B is wrong.
When thermal energy is being transferred out of the substance, one could understand it as taking out some particles out of the substance. So what is changed here? I would think that the total kinetic energy is being changed, since some particles have been taken away. But the taking away of the particles would not affect the speed of the remaining particles. The AVERAGE kinetic energy should remain unchanged. Hence, C is also wrong.
2006-11-16 20:32:12 · answer #1 · answered by orhhai 2 · 1⤊ 0⤋
it relies upon on how they alter. for occasion while your heating a water for it to turn right into a gas state. this is temperature have been given to get larger or warmer as properly. if your attempting to alter a water to a stable sort, this is temperature has to flow down under 0 stages celcius.
2016-12-29 03:34:47 · answer #2 · answered by ? 3 · 0⤊ 0⤋
The potential enery changes too.
2006-11-16 20:12:24 · answer #3 · answered by Anonymous · 0⤊ 0⤋
d
2006-11-16 20:05:31 · answer #4 · answered by Nemesis 7 · 0⤊ 0⤋
B
2013-11-25 04:35:20 · answer #5 · answered by Bella Atchley 1 · 0⤊ 0⤋