Praxis Chemistry 5245 Study Questions and Answers

First Law of Thermodynamics Law of Conservation of Energy Law of Conservation of Mass Total Mass of Products = Total Mass of Reactants Kinetic Energy KE = 1/2 mv² Heat Flow of Thermal Energy Conduction Heat transferred directly Convention Heat transferred through currents Radiation Heat transferred through electromagnetic waves Specific Heat The amount of heat requires to raise the temperature of a unit of mass by 1°. C = Q/m delta T Sublimation Point The portion of the curve that shows all combinations of pressure and temperature at which the solid phase is in equilibrium with the gaseous phase Critical Point The point at which the solid, liquid and gaseous phases are all in equilibrium Boiling Point combinations of pressure and temperature at the liquid phase and gas phase are in equilibrium Heat of Vaporization deltaHvap amount of heat that must be added to one mole of a substance to change the substance from the liquid phase to the gas phase