Specific Heats and Temperature

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SUMMARY

The specific heat capacity of materials is temperature-dependent, particularly at high temperatures. Touloukian et al.'s "Thermophysical Properties of Matter" (1970) provides measured values of specific heat capacities across varying temperatures. Most metals exhibit a molar heat capacity of approximately 3R at room temperature, converging to this value at elevated temperatures. Simple compounds, such as NaCl, demonstrate a heat capacity that varies around 3R per atom, influenced by the energy-storing capacity of atoms in a crystal, as explained by statistical mechanics.

PREREQUISITES
  • Understanding of specific heat capacity and its significance in thermodynamics.
  • Familiarity with statistical mechanics and its application to material properties.
  • Knowledge of temperature scales, particularly Kelvin.
  • Access to thermophysical property databases, such as NIST Chemistry WebBook.
NEXT STEPS
  • Research the specific heat capacities of various materials at high temperatures using Touloukian et al.'s work.
  • Explore statistical mechanics to understand the energy-storing capacity of atoms in solids.
  • Investigate the relationship between temperature and specific heat capacity for ionic compounds like NaCl.
  • Utilize the NIST Chemistry WebBook for comprehensive data on thermophysical properties.
USEFUL FOR

Researchers, materials scientists, and engineers interested in thermodynamics, specifically those studying the thermal properties of materials at high temperatures.

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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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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