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Heat Capacity and Specific Heat

Posted: Fri Jan 08, 2016 10:31 pm
by Mya Majewski 1L
I know we went over these two topics in lecture today, but how exactly do these to correlate with enthalpy? In other words, what does specific heat and heat capacity tell us?

Re: Heat Capacity and Specific Heat

Posted: Fri Jan 08, 2016 10:46 pm
by Chem_Mod
Heat capacity is the energy needed to increase the temperature of an object by 1 Kelvin (extensive property)
Specific heat capacity is the energy needed to increase the temperature of one gram of a substance by 1 Kelvin (intensive property)

Under constant pressure conditions, the heat transferred is equal to the enthalpy change. When dealing with liquids and solids, it doesn't really matter whether we are at constant pressure or volume due to the incompressibility, and so the heat transferred will be automatically equated to the enthalpy change.