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Overview         (For age - group : Above 16 )

This 25-minute physics animation shows what is happening at molecular level and where does the energy absorbed go during phase change. Explanation includes effect of phase change on potential, kinetic energy and bond length between molecules. It is meant for high school and college science students.

Product - Animation
  Size/Time Subscribe Preview / Trailer
Size (KB) 443 US$    1.50 Rs. 108.00
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Subscription Days = 30 Watch a preview (opens in separate window)
Time (hr:min:sec) 0:25:0
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Category : Physics
Type : Animation
Animation Type : Advanced

Total animation length
: 25 minutes

  • Refer Details section for content of the animation or else watch preview.


animation of phase change of ice to water involves internal energy

Animation shows macroscopic and microscopic view of phase change of ice simultaneously, at macroscopic level we see temperature increasing due to energy and microscopically we see increasing vibrations of molecules due to KE.

crystals of ice break up to form molecules of water during phase change

Animated explanation of how a phase change involving change of energy of a substance, also affects its internal energy (IE).

Latent heat of vaporisation animation

Co-relation between energy and temperature , why so much heat is required to convert water to vapor at 100 deg C.
Details of the animation/ movie /software
    This science animation explains the following in detail:
  1. Change in energy of water from -5 OC to 0 OC , 0 OC to 100 OC and at 100 OC
  2. How are internal energy and temperature related?
  3. Potential, Kinetic energy and bond length between molecules.
  4. What are melting and boiling points?
  5. Where does the heat supplied to ice/water at these points go?
  6. Why does the average KE remain constant at 0OC?
  7. What is latent heat of fusion?
  8. Why does internal energy increase at melting / boiling point
  9. Why does it take 5 times the energy to convert water to vapor as compared to that used in heating it from 0O C to 100O C?
  10. At 100 OC besides breaking the bonds, what else is heat used for?
  11. Why does the PE reach a maximum at 100 OC and then suddenly become zero?
  12. What does the latent heat of vaporization convert into?
  13. Is temperature proportional to internal energy?

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Q & A
Q1: la relation entre énergie thermique et chaleur zekour 18/10/2013
Q2: what is the different b/w heat and temperature? abdikadir 18/1/2013
Q3: Does changing the state of matter affect the density of the matter? Annelee Parsons 8/4/2008
Q4: why molecule is not vibrate bidadari 4/4/2008
Q5: Where does energy go during a phase change? kiana 14/12/2006
Ans: During a phase change the energy is used in breaking bonds to enable a solid-liquid, liquid-gas conversion, in other words it is used for counteracting the effect of attraction ( or potential energy) that binds the molecules together.

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