Understanding Heat Capacity of Different States: Water, Ice, and Steam

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Homework Help Overview

The discussion revolves around the concept of heat capacity, specifically in relation to the different states of water: solid (ice), liquid (water), and gas (steam). The original poster seeks clarification on whether heat capacity is state-dependent and how it varies among these states.

Discussion Character

  • Conceptual clarification

Approaches and Questions Raised

  • The original poster questions whether the specific heat capacity of water applies similarly to its solid and gaseous states. Some participants clarify that the specific heat capacity values differ among the states.

Discussion Status

The discussion is ongoing, with participants providing clarifications about the differences in heat capacities among ice, water, and steam. There is an acknowledgment of the variations, but no consensus has been reached on the implications of these differences.

Contextual Notes

Participants reference specific heat capacity values and note that these values can vary with temperature, particularly near phase transitions. The original poster's understanding of heat capacity appears to be developing, with some confusion remaining about the relationship between the states.

Kyoma
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I have just learned 'heat capacity'. But I'm curious: does heat capacity apply to a substance's current state (solid, liquid or gas) or does it apply to all of its state?

eg. Water has a specific heat capacity of 4200 J kg-1 K-1, so does that mean ice and steam both have similar heat capacity as water?
 
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Nope, that figure you cited is the specific heat capacity of liquid water. Note that it varies slightly as a function of temperature, most noticeably near freezing point (Although even then it is a negligible variation).

For reference, the heat capacities of ice and steam can be found here:
http://www.engineeringtoolbox.com/water-thermal-properties-d_162.html
 
So, heat capacity of ice and steam is not the same as liquid water? Don't understand what you are talking about :-p
 
Kyoma said:
So, heat capacity of ice and steam is not the same as liquid water?

Yes, they are different.
 

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