CHEM 1050 Chapter Notes - Chapter 6: Thermodynamic System, Heavy Object, Thermodynamics
23 Oct 2016
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Energy: the potential or capacity to move matter: a property of matter and exists in different forms that can be converted. Heavy object moves slower than light object. Calorie (cal): a non-si unit of energy commonly used by chemists, originally defined as he amount of energy needed to raise the temperature of 1 gram of water by 1 degree. Celsius: later defined as: 1 cal = 4. 184 j. Potential energy: the energy an object has by virtue of its position in a field of force. Internal energy (u): the sum of the kinetic and potential energies of the particles making up a substance: etot = ek + ep + u. Usually substance is studied in a vessel so the kinetic energy is 0. Also potential energy as a whole is a constant and is taken as 0, so in these cases, total energy = internal energy.
