GEOL 250 Lecture Notes - Lecture 4: State Function, Exothermic Process, Thermodynamics

• School: College of Charleston
• Department: Geology and Environmental Geosciences
• Course: GEOL 250
• Professor: Vulava

Document Summary

Energy cannot be created or destroyed can only be converted to other forms. Also called heat of formation or standard heat of formation. Enthalpy change that occurs when a compound forms from it elements at particular p&t (standard state) Q = heat exchanged between system and surroundings. W = work done on or by system. Tracks work done by sys & energy released as heat under constant p. Accounts for internal energy & pv work. H = q p = sys e + p v. Quantifies heat flow into/out of system at constant p. Can be used to determine if the system gains or loses heat. Needs to be performed on a balanced reaction. Heat given off by the system to the surroundings. Heat absorbed by the system from the surroundings. Depend on sys conditions (v,p, t, etc. ) Fh for most stable form of an element is arbitrarily zero.