- Specific Heat Capacity Definition
48Jk -1 mol -1. the reason is that the one mole of all the monoatomic elements have Avogadro's number of atoms, in other words, 12. 48 jouls is the demand of Avogadro's number of atoms, when we change their temperature by 1°C (1 °K) say for He, Ne, Ar etc. now you understand the first property of heat capacity. we try to understand the second, Heat capacity at constant pressure (Cp) it is the amount of heat required to raise the temperature of one mole of gas by 1°C (1K) keeping the pressure constant and the volume is allowed to increase. it is denoted by Cp. [wp_ad_camp_4] Actually, When we measure C p value of gas then some energy is expended in the expansion of the gas and pressure-volume work is done. let us calculate the additional pressure-volume work. the general gas equation for one mole of an ideal gas is PV = RT ……. (4) suppose that by increasing the temperature by one kelvin from T to ( T+1). the volume changes from V to (V + ΔV), so P( V+ ΔV) = R( T+1) …… (5) PV+ PΔV = RT+R …….. (6) substitution equation (4) in equation (6).
Specific Heat Capacity Definition
How do I convert watts into J/KgK? Watts and J/KgK measure different things and cannot be "converted" to one another. J/KgK is the heat capacity, which is a property intrinsic to a particular material, while Watt is a unit of power. Why would we calculate heat capacity of material? Octavian Octa
Community Answer
It would help you if you wanted to use one of the materials as a radiator, or if you wanted to calculate the temperature of an assembly in different conditions. These are just two examples, but there can be a lot of others. How much heat is needed to take ice of mass 720 g at -10 degrees Celsius to liquid state at 15 degrees Celsius? Use Q = mc* (change in temp) for the liquid state; c = specific heat capacity- 4. 2 J/g, m = mass of ice, and Q is the heat required. For the solid state, use same equation, with different specific heat capacity, use that of ice. For the heat required to melt it, use Q = mLf, where Q is heat, m is mass, and Lf is the latent heat of fusion of ice. Add those three values together for the final answer.
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