Specific Heats and Temperature

In summary, the specific heat capacity of a material is a function of temperature, with most metals having a molar heat capacity of 3R at room temperature. Touloukian et al's Thermophysical Properties of Matter (1970) is a good reference for specific heat capacities vs. temperature. Simple compounds tend to have a heat capacity of around 3R per atom, with a large amount of data available on the NIST Chemistry WebBook.
  • #1
Nabeshin
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I understand the the specific heat capacity of a material is a function of temperature.

Does anyone know of either a site (or reference) which has a large list of specific heat capacities for varying temperatures (large variety of temperatures is preferable to a large variety of materials), or a general relation between specific heat capacity and temperature? My interest is primarily on the higher bound of temperature, likely in the range of high hundreds to possibly mid thousands of kelvin, so if the specific heat capacities converged to some limit or something around that value, that would be great.
 
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  • #2
Check Touloukian et al, Thermophysical Properties of Matter (1970) (New York: IFI/Plenum) for measured value vs. temperature.

Most metals have a molar heat capacity of 3R at room temperature (about 25 J mol-1 K-1), and most or all solid elements converge to this value at high temperatures. Simple compounds often have a heat capacity varying broadly around 3R per atom (e.g., NaCl, 50 J mol-1 K-1; as an ionic crystal, particularly close). This is a consequence of the energy-storing capacity of atoms in a crystal and is modeled/explained by the field of statistical mechanics.
 
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  • #3

1. What is specific heat?

Specific heat, also known as specific heat capacity, is the amount of heat energy required to raise the temperature of one gram of a substance by one degree Celsius.

2. How is specific heat different from heat capacity?

Specific heat is a measure of heat energy per unit mass, while heat capacity is a measure of heat energy per unit volume. In other words, specific heat takes into account the mass of a substance, while heat capacity does not.

3. What factors affect the specific heat of a substance?

The specific heat of a substance is affected by its chemical composition, temperature, and state (solid, liquid, or gas). Different substances have different specific heats, and the specific heat of a substance can also change depending on its temperature and state.

4. How is specific heat measured?

Specific heat is typically measured using a calorimeter, which is a device that measures the amount of heat exchanged between a substance and its surroundings. The change in temperature of the substance is measured and then used to calculate the specific heat.

5. Why is specific heat important in scientific research?

Specific heat is important in scientific research because it helps us understand how different substances respond to changes in temperature. It also plays a crucial role in various engineering applications, such as designing heating and cooling systems, and in the study of thermodynamics and heat transfer.

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