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melanie
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Just trying to locate specific heat constants with constant volume (not pressure), any ideas where to find this?
And that's only at around room temperature's where the vibrational degree of freedom is absent. At high temperatures, f will be 7 for diatomic gases.quark said:One correction to Dr.Brain's post. f for diatomic gases is 5
Constant volume specific heat, also known as isochoric specific heat, is the amount of heat required to raise the temperature of a unit mass of a substance by one degree at constant volume.
Constant volume specific heat is measured at constant volume, while constant pressure specific heat is measured at constant pressure. This means that the volume of the substance remains constant during the measurement of constant volume specific heat, while the pressure remains constant during the measurement of constant pressure specific heat.
The formula for calculating constant volume specific heat is: cV = Q / (m * ΔT), where cV is the constant volume specific heat, Q is the amount of heat added, m is the mass of the substance, and ΔT is the change in temperature.
Constant volume specific heat is used in thermodynamics to calculate the amount of heat needed to raise the temperature of a substance in a closed system. It is also used in the design of engines and other heat transfer devices. Additionally, it is useful in understanding the behavior of gases, such as in the ideal gas law.
Constant volume specific heat can be experimentally determined by measuring the change in temperature of a substance at constant volume while adding a known amount of heat. This process can be repeated multiple times to obtain an average value of cV. Other methods, such as differential scanning calorimetry, can also be used to determine cV.