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If you start with a substance as a solid, what will happen to the molecules as you add thermal energy (heat)?
A. molecules slow down due to an increase in kinetic energy
B. molecules speed up due to an increase in potential energy
C. molecules speed up as more thermal energy is added
D. molecule movement remains the same

Respuesta :

quasarJose

Answer:

C. molecules speed up as more thermal energy is added

Explanation:

The molecules will simply speed up as more thermal energy is added to the solid.

Thermal energy is a form of kinetic energy which is set in motion.

  • Heat causes kinetic energy build up in a body.
  • As the molecules of the solid gains heat, they will continue to increase in thermal energy.
  • They are forced to start vibrating about their fixed point.
  • Thereafter, when they have enough energy, they break free from the forces holding them.
  • Therefore, they move from a state of rest to one with a very high kinetic energy where the molecules moves rapidly.
  • This is why a solid will change to liquid and sometimes eventually gas

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