CAS CH 101 Lecture Notes - Lecture 2: Electric Potential Energy, Atomic Number, Charge Radius
4 Apr 2016
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Document Summary
Most important ep: electrostatic coulomb potential energy due to the interaction for two electrical charges, q1 and q2 (si unit- coulomb c), separated by a distance, r o. Ep = q1 q2 / (4 pi eo r) The charge on an electron is -1. 602 x 10^-19 c. Ep of attraction is negative, ep of repulsion is positive. Eo = 8. 8547878 x 10^-2 c^2 j^-1 m^-1. Atoms and molecules are held together by the attraction of unlike charges, like charges repel. Heat of reaction rises from the inerconversion of bond potential energy and thermal potential energy and thermal kinetic energy, ex: water falling. The force on an object is determined by how ep changes as the object moves in one dimension, the force given by: o. Force points in the direction of decreasing potential energy. Force causes an object to change its course of motion, force = mass x acceleration.
