highschool chemistry question?

Question

anonymous · Answer

A typical phase change diagram is shown below. Which of the numbered arrows represent changes where the kinetic energy of the particles increases?

 1 and 2 

 1 and 3 

 2 and 4 

 3 and 4 

please explain and not just give answer -  i would like to learn

mathmate · Answer

Assuming conservation of energy, which is true in most practical cases:
When more energy is supplied to the system, and the temperature does not increase, where would the energy go?

(There is also a chemistry group at Open Studies)

anonymous · Answer

I'm not sure..

mathmate · Answer

The energy goes into breaking bonds in order to change the state of the fluid's state (phase changes), such as from ice to water, or from water to steam.
In general, the higher the temperature, the more kinetic energy the molecules get.  That's why for a gas, if we increase the temperature, the pressure increases (for a fixed volume).
Hope there is enough hint to enable you to venture an answer.
If it is still not too clear, try the chemistry group, which has experts in this field.

anonymous · Answer

http://en.wikipedia.org/wiki/Heat_capacity#Theory_of_heat_capacity See the picture to the right- energy is sometimes stored not in kinetic (heat) energy of the particles, but in potential energy (maybe the kinetic energy of individual atoms that doesn't contribute the the overall molecule's movement (heat)

anonymous · Answer

Also http://en.wikipedia.org/wiki/Chemical_potential#Overview The 2nd/3rd paragraph& picture as to what chemical potential energy actually IS