Question

At which of the following temperatures does all molecular motion stop

Answer 1

All molecular motion stop at 0 k wich is zero kelvin. At absolute 0 it stops. The temperature of 0 entropy at which all molecular motion stops equals in centigrades to -273.15° C which is the same as 0 in kelvin degrees. Have in mind that temperature is a measure of the average kinetic energy of the molecules in a material.