How does the potential energy of water change between 99 oC and 1 oC?

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Discussion Overview

The discussion revolves around the potential energy of water at two different temperatures, 99 °C and 1 °C. Participants explore the relationship between temperature and energy forms, particularly focusing on potential versus kinetic energy, and the implications of thermal energy in the context of water's state.

Discussion Character

  • Debate/contested, Conceptual clarification, Technical explanation

Main Points Raised

  • One participant asks about the potential energy difference between water at 99 °C and 1 °C.
  • Another participant asserts that the potential energy is different due to the higher thermal energy of the hotter water, which they relate to faster molecular vibrations.
  • A third participant counters that the increased energy described is kinetic energy, not potential energy.
  • One participant acknowledges the kinetic energy argument but suggests that in a thermally isolated system, the thermal energy can be considered as potential energy, discussing various forms of stored energy in different states of matter.
  • Another participant points out that the original question lacks clarity regarding the amount of water being considered at each temperature.
  • A subsequent reply argues that assuming the same amount of water is reasonable and that a quantitative description could be provided without needing additional information.

Areas of Agreement / Disagreement

Participants express differing views on the definitions and implications of potential versus kinetic energy in this context. There is no consensus on the interpretation of potential energy related to temperature changes in water.

Contextual Notes

The discussion highlights ambiguities in the original question, particularly regarding the quantity of water involved, which affects the interpretation of energy changes.

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Going to have a exam please help me :)

will the potential energy different between 99 oC water and 1 oC water ?
 
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Yes the potential energy is different as the hotter water has more thermal energy which manifests itself as faster vibration.
 
That is kinetic energy, not potential energy.
 
Yes that is true in terms of individual water molecules, but the water is effectively storing it as potential energy if it is thermally isolated. When considering stored energy of gas or liquid or solid (stored as in potential) you always consider the gravitational, thermal (or translational) and any kind of rotational and vibrational energy. In the case of the gas the pressure and volume also have an effect.
 
The question is too ambiguous. It does not provide the amound of water under each condition.
 
Thats hardly a necessary requirement. If you used a bit of logic and concluded he was talking about the same amount then a simple quantitative description would suffice.
 

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