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Explain heat, heat capacity, and specific heat; Distinguish between conduction, convection, and radiation; Solve problems involving specific heat and heat transfer
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Heat capacity is the measurable physical quantity that characterizes the amount of heat required to change a substance’s temperature by a given amount. It is measured in joules per Kelvin and given by. The heat capacity is an extensive property, scaling with the size of the system.
In the chapter on temperature and heat, we defined the specific heat capacity with the equation \(Q = mc\Delta T\), or \(c = (1/m)Q/\Delta T\). However, the properties of an ideal gas depend directly on the number of moles in a sample, so here we define specific heat capacity in terms of the number of moles, not the mass.
The symbol c stands for the specific heat (also called “specific heat capacity”) and depends on the material and phase. The specific heat is numerically equal to the amount of heat necessary to change the temperature of \(1.00 \, kg\) of mass by \(1.00^oC\).
The specific heat capacity of a material is the energy required to raise one kilogram (kg) of the material by one degree Celsius (°C). Learn more about specific heat capacity in this podcast ...
20 lis 2023 · Specific Heat Capacity Equation. The amount of thermal energy Q needed to raise the temperature by Δθ for a mass m with specific heat capacity c is equal to: ΔQ = mcΔθ. Where: ΔQ = change in thermal energy (J) m = mass of the substance you are heating up (kg) c = specific heat capacity of the substance (J kg -1 K -1 or J kg -1 °C -1)
In the chapter on temperature and heat, we defined the specific heat capacity with the equation Q = m c Δ T, Q = m c Δ T, or c = (1 / m) Q / Δ T c = (1 / m) Q / Δ T. However, the properties of an ideal gas depend directly on the number of moles in a sample, so here we define specific heat capacity in terms of the number of moles, not the mass.
