In which of these samples do the molecules most likely have the least kinetic energy?

solid iron at 25°C
molten iron at 1600°C
solid iron at 98°C
iron vapor at 2900°C

Question

In which of these samples do the molecules most likely have the least kinetic energy?

 solid iron at 25°C
 molten iron at 1600°C
 solid iron at 98°C
 iron vapor at 2900°C

flashp · Answer

@TheSmartOne @ganeshie8 @pooja195 @ParthKohli @Anaise

flashp · Answer

A is what I'm leaning on

ganeshie8 · Answer

That's correct.
Lower the temperature, lower the kinetic energy.

flashp · Answer

Yes! One more

Tanks of compressed gas must be kept away from heat sources. If a compressed–gas tank is heated too much, it may explode and cause a great deal of damage. Which of the following best explains why a compressed–gas tank can explode if it is heated?

 As the gas gets hotter, the molecules gain energy and move farther apart, causing the gas to expand.
 As the gas gets hotter, the molecules expand, causing the gas to exert more pressure.
 As the gas absorbs heat, the molecules break apart, increasing the volume of the gas.
 As the gas absorbs heat, the molecules move more quickly, making the gas more corrosive.

flashp · Answer

@ganeshie8

ganeshie8 · Answer

As you put more heat into the system, the temperature rises.

ganeshie8 · Answer

More tempeature implies more energy

flashp · Answer

I got it now! Thanks.