CP Chemistry Vocab

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CP Chemistry Vocab

Ch 11

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1 Calorie
 
1 kilocalorie = 1000 calories
1 J = 0.239 cal
 
4.184 J = 1 cal
C = q/ M x ?T
 
heat ( joules or calories) / mass(g) x change in temperature (?C)
calorie
 
the quantity of heat needed to raise the temperature of 1g of pure water 1?C
calorimeter
 
the isulated device used to measure the absorption or release of heat in chemical or physical processes
calorimetry
 
the accurate and precise measurement of heat change for chemical and physical processes
chemical potential energy
 
energy stored within the structural units of chemical substances
endothermic process
 
a process that absorbs heat from the surroundings
energy
 
The capacity for doing work or supplying heat
Enthalpy (H)
 
the heat content of a system at constant pressure
Exothermic Process
 
a heat-dissipating process
heat
 
the energy that is transferred from one body to another because of a temperature difference
heat capacity
 
the quantity of heat required to change an object's temperature by exactly 1 ?C
heat of combustion
 
the heat released during a chemical reaction in which one mole of a substance is completely burned
heat of reaction
 
the heat released or absorbed during a chemical reaction; equivalent to h, the change in enthalpy
Hess's law of heat summation
 
in going from a particular set of reactants to a particular set of products, the enthalpy change is the same whether the reaction takes place in one step or in a series of steps
joule
 
the SI unit of energy; 4.184 J equals one calorie
law of conservation of energy
 
energy is neither created nor destroyed in an ordinary chemical or physical process
molar heat of condensation
 
the heat,in joules or calories, released by 1 mole of a substance as it changes from a vapor to a liquid at the liquid's boiling point
molar heat of fusion
 
the energy,in kilojoules, required to melt 1 mole of a solid
molar heat of solidification
 
the heat,in joules or calories, released by 1 mole of a substance as it changes from a liquid to a solid at the solid's melting point
molar heat of solution
 
the heat,in joules or calories, released by 1 mole of a substance as it dissolves in water to produce 1 liter of a 1 molar solution
molar heat of vaporization
 
the energy, in kilojoules, required to vaporize 1 mole of a liquid
specific heat
 
the quantity of heat, in joules or calories, required to raise the temperature of 1 g of a substance 1?C
standard heat of formation
 
the change in enthalpy for a reaction in which one mole of a compound is formed from its constituent elements
surroundings
 
the remainder of the universe that is outside the system
system
 
any part of the universe upon which attention is focused
thermochemical equation
 
a chemical equation that includes the amount of heat produced or absorbed during the reaction
thermochemistry
 
the study of heat changes in chemical reactions
universe
 
the totality of all existing things
universe
 
the totality of all existing things
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