Kinetic theory and temperature

Question

1. Explain why molecules have no kinetic energy when the temperature is 0 K.
2. Explain why there can be no temperature lower than 0 K.
3 some gas in a container is heated. What happens to the temperature?
4 some gas in a container is heated. What happens to the energy of the molecules?
5.The molecules in a gas slow down. What happens to the temperature of the gas?
6 .The molecules of a gas lose energy. What happens to the temperature of the gas?
7 The kinetic energy of a molecule can be found using this formula: KE = 1/2mv^2.
(a) What would happen to the kinetic encrgy of a molecule if its velocity doubled?
(b)What would happen to the temperature of some gas if the average velocity of the molecules doubled?

Answer 1

1. Because, theoretically, at 0 K, no molecule or atom is in motion. 2. It is theoretical, it is impossible to stop molecules from moving. 3. Temperature increases. 4. Kinetic energy of molecules is increasing. 5. Temperature is proportional to KE of molecules. If they slow down, KE is decreasing and temperature is decreasing. 6. Same as 5. 7. if velocity doubles, KE increases x4. b) temperature x4 (if everything else about the gas remains the same.