Which of the following requires a decrease in kinetic energy?

Question

anonymous · Answer

solid arrow liquid 
   gas arrow solid 
   liquid arrow gas 
   solid arrow gas

koikkara · Answer

Hai Sweet Friend, @zach921 WelcoMe To OpeN studY !! hmm...it is solid to liquid gas to solid liquid to gas solid to gas Ref: http://physics.tutorvista.com/thermodynamics/phase-change.html So After reading this which one is your answer ? Hope, if U Are Satisfied with this Answer, Please Close This Question ! Thank U !! Keep In Touch, with Open study !!

abb0t · Answer

if you decrease the kinetic energy, that means that the particles are moving slower, meaning. If there is less movement of the particles, that means they are forming into something, mayb a solid or liquid.

anonymous · Answer

gas to solid because the molecules have to slow down to undergo the phase change from gas to solid. Gases on a molecular level are moving and bouncing around so fast they have a lot of kinetic energy. In the solid phase, the molecules are barely moving at all, just vibrating, so they have a lot less kinetic energy compared to gases. So changing from a gas to a solid requires a decrease of kinetic energy.