3rd 9 Weeks Exam Flashcards
(30 cards)
SI unit of heat and energy
Joule
Capacity for doing work or supporting heat
Energy
Concerned with heat changes that occur during chemical reactions
Thermochemistry
The amount of heat it takes to raise the temp of 1 gram of the substance (water=4.18)
Specific heat capacity
For systems at constant pressure, the heat content is the same as H
Enthalpy
Energy released as heat when a compound undergoes complete combustion
Heat of Combustion
The change for the equation, exactly as written
Heat of a Reaction
The accurate and precise measurement of heat change for chemicals and physical properties
Calorimetry
The amount of heat energy that must be removed from one mole of a vapor at its condensed point.
Molar Heat of Condensation
The heat absorbed by one mole of a substance in melting from a solid to a liquid
Molar heat of fusion
The amount of heat necessary to vaporize one mole of a given liquid
Molar heat of vaporization
Heat lost when one mole of liquid solidifies
Molar heat of solidification
Heat change caused by dissolution of one mole of substance
Molar heat of solution
Heat flowing out of a system flowing into its surroundings
Defined as negative
System loses heat as surroundings heat up
Exothermic Reaction
Heat flowing into a system
Defined as positive
System gains heat as surroundings cool down
Endothermic reaction
“Nuclear model”
Discovered nucleus inside of atom
Rutherford
Discovered every element has its own element
Dalton
“Plum Pudding Model”
Discovered electrons
Thomson
“Planetary Model”
Came up with quantum mechanical model
Bohr
Electrons will not pair up unless forced to
Hund
Matter is made up of solid invisible particles
Democritus
Electrons enter lowest energy level first
Aufbau
2 electrons per orbital and they have different spins
Pauli
Speed of light
3x10^8 m/s
