CHEM 1050 Study Guide - Midterm Guide: Triple Bond, Joule, Bond Energy
Document Summary
Thermochemistry: the study of the heat given off or absorbed in a chemical reaction. Involves the transfer of energy between the system and surroundings. Open: both mass and energy may leave and enter. Closed: energy can be exchanged, but no mass can enter or leave. Isolated: neither mass or energy may enter or leave. Surroundings: the rest of the universe around the system. State of a system is characterized by p, v, t, and n. Internal energy (u): the sum of the kinetic and potential energy of the system. Can change by heat (q) or work (w) First law of thermodynamics: law of conservation of energy states that energy may be converted from one form to another, but the total quantity of energy remains constant. Energy can be transferred in and out of the system. Heat flows from the hotter object to the cooler object.