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

solid ice at −5°C

ice water at 0°C

liquid water at 98°C

water vapor at 150°C

Question

In which of these samples do the molecules most likely have the most kinetic energy?

 solid ice at −5°C

 ice water at 0°C

 liquid water at 98°C

 water vapor at 150°C

abmon98 · Answer

Temperature-measures the average K.E energy of a sample. Energy is the ability to do work. Kinetic energy is the energy of motion. molecules are always in motion 
K.E=1/2mv^2. molecules can vibrate if they are at their solid state. higher temperature have higher kinetic energy higher speed because mass is constant.