# Thermochemistry Heat and Chemical Change Flashcard

 Thermochemistry
 heat changes that occur during chemical reactions
 Energy
 The Capisity for doing work and supplying heat
 Chemical potential energy
 Energy stored within the structural units of chemical substances
 Heat
 Represented by “q”, Is the energy that transfers from one object to another because of temperature differances between them
 System
 Part of the universe on which you focus your attention
 Law of conversion of energy
 Any chemical or physical process, energy is neather created or destroyed.
 Endothermic process
 A process that obsorbs heat from the suffoundings
 Exothermic Process
 A process that releases heat into its surroundings
 Calorie
 A quantity of heat required to raise temperature of 1 g of pure water to 1 degree Celcius
 Heat Capasity
 The amount of heat needed to increase temperature of an object exactly 1 dagree celcius
 Specific Heat Capacity ( Specific Heat)
 Amount of heat its takes to raise the temperature of 1 g of a substance to 1 dagree celcius.
 Calorimetry
 the accurate and precise measurement of heat change for chemical and physical process
 Calorimiter
 An insulated device that is used to measure the absorbion or release of heat in chemical or physical processes
 Enthalpy
 For systems at constant pressure, the heat content is the same property
 thermochemical equation
 An equation that includes the heat change
 Heat reaction
 Heat change for anequation exactly as it’s written
 Molar heat of solidification
 heat lost when 1 mole of liquid solidifies at a constant temperature
 Molar heat of fusion
 Heat obsorbed by 1 mole of a substance in melting from a solid to a liquid at constant temperature
 Molar heat of vaporization
 Energy required to vaporize 1 mole of a substance
 Molar heat of condensation
 amount of heat when 1 mole of vapor condences
 Molar heat of solution
 Heat caused by dissolution of one mole of a substance
 Hess’s law of heat summation
 If you add 2 or more thermochimical equations to give one final equation, then you can also add the heats to get one final heat of reaction.
 Phase Diagram
 Gives conditions of temperature and pressure at which a substance exists as a solid
 Tripple point
 all three phases exist in equilibrium
 sublimation
 from solid to vapor
 Vaporization
 gat to vapor
 Evaporation liquid to a gas
 normal boiling point
 substance boils at 101.3 kpa