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Chapter 16
N/A
15
Chemistry
10th Grade
05/06/2009

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Term
Thermochemistry
Definition
is the study of the trasnfers of energy as heat that accompany chemical reactions and physical changes
Term
Calorimeter
Definition
the energy absorbed or released as heat in a chemical or physical change
Term
Temperature
Definition
is a measure of the average kinetic energy of the particles in a sample of matter
Term
Joule
Definition
is the SI unit of heat as well as all other forms of energy
Term
Heat
Definition
can be thought of as the energy trasferred between samples of matter because of a difference in their temperatures
Term
Specific Heat
Definition
is the aount of energy required to raise the temperature of one gram of a substance by one Celcius degree or one Kelvin
Term
Enthalpy Change
Definition
is the amount of energy absorbed by a system as heat during a process at constant pressure
Term
Enthalpy of Reaction
Definition
is the quantity of energy transferred as heat during a chemical reaction
Term
Thermochemcial Equation
Definition
an equation that includes that quantity of energy released or absorbed as heat during the reaction as written
Term
Molar Enthalpy of Formation
Definition
is the enthalpy change that occurs when one mole of a compound is formed from its elements in their standard state
Term
Enthalpy of Combustion
Definition
occurs during the complete combustion of one mole of a substance
Term
Hess's Law
Definition
the overall enthalpy change in a reaction is euqal to the sum of the enthalpy changes.
Term
Entropy
Definition
a measure of the degree of the randomness of the particles, such as moleucles, in a system
Term
Free Energy
Definition
The combined enthalpy-entropy function
Term
Free Energy Change
Definition
the difference between the change in Enthalpy, and the product of the Kelvin temperature and the entropy change, T/S
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