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Chemistry

Chapter 11 Vocab

TermDefinition
Condensation the process by which a gas changes to a liquid
evaporation the process by which a liquid changes to a gas
melting when a solid changes into a liquid
freezing when a liquid changes into a solid
enthalpy the total energy content of a system (energy)
entropy a measure of the randomness or disorder of a system
specific heat capacity the amount of heat energy required to raise the tempurature of 1g of a substance by 1 K
thermodynamics energy changes that accompany physical and chemical processes
endothermic when something is absorbing heat
exothermic when heat is leaving something, or when heat is being given off by something
Gibbs energy a thermodynamic property incorporating both enthalpy and and entropy
Calorimeter a device used to measure the heat absorbed or released in a chemical or physical change
Hess's Law the overall enthalpy change in a reaction equal to the sum of the enthalpy changes of the individual steps of the process
Standard enthalpy of formation the amount of heat released ot absorbed when i mol of compound is made from its elements under standard conditions
Gibbs energy a thermodynamic property incorporating both enthalpy and entropy
intensive property a property that does not deoend on the amount of material present
extensive property a property that depends on the amound of material present
Sublime going directly from a solid to a gas
heat (enthalpy) of fusion the heat absorbed by a solid to get it to a liquid. (to its melting point)
enthalpy of vaporization the amount of heat it takes to get a liquid to a gas
calorimetry the act of measuring the heat of something or making such measurements
spontaneous occuring without added energy
Created by: laurenthomas
 

 



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