Internal Energy (E) is the total thermal energy in a system.
Work (W) is the work done ON the system.
Heat (q) is the heat added to a system.
Therefore ΔE = q + W with W = -PΔV
Adiabatic: A process for which no heat is exchanged with the system
Adiabatic: ΔE = W
At constant pressure, q = H H is enthalpy
At constant volume ΔE = q
Exothermic: A chemical process which produces heat. ΔH < 0
Endothermic: A chemical process which absorbs heat. ΔH > 0
Def: A state function is a variable whose change only depends on the beginning and final state. The state function is independent of path taken.
Calorimetry:
1. The specific heat of a substance is the heat required to raise one gram of that substance by one degree centigrade. (units: J/gC)
2. The heat capacity of a system is the heat required to raise that particular system by one degree centigrade. (units J/C)
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