CHEM 1050 Chapter Notes - Chapter 6: Enthalpy, Endothermic Process, Exothermic Process
6 Oct 2017
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Joule: the si unit of energy (kg m2/s2: 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 o 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. If the surroundings decrease in energy, it means that the system absorbed energy so you would write q. = +x j, with x being the amount of energy. If the surroundings increase in energy, it means that the system evolved energy so you would write w =
