Ch:5 thermochemistry

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Thermochemistry

Is a portion of thermodynamics that involves the study of heat transfer during chemical reactions .
Thermodynamics

The study of energy and its transformation
Energy

the ability to do work or transfer heat
Heat

Energy used to cause the temprature of an object to rise
Kinetic Energy

The energy of motion Depends on mass of object and its speed
Potential Energy

is the energy available by virtue of an object's position
Thermal energy

is the energy associated with therandom motion of atoms and molecules
Chemical energy

is the energy stored within thebonds of chemical substances
Nuclear energy

is the energy stored within thecollection of neutrons and protons in the atom
Enthalpy

is the internal energy plus the product of pressure and volume
Calorimetry measurements based on

Heat flow changein (T) experienced by object is determined by its heat capacity
heat capacity.

The amount of energy required to raise the temperature of a substance by 1 K (or 1C)
Hess’s Law

If a reaction is carried out in a series of steps, H for the overall reaction will be equal to the sum of the enthalpy changes for the individual steps
Standard state of a substance

is the pure form of substance at 1 atm and temperature of interest (which usually choose to be 25 C)
Standard enthalpy of formation (H of)

is the change in enthalpy for the reaction that forms one mole of the compound from its elements, with all substances in their standard states.

Author

shoosh

174169

Card Set

Ch:5 thermochemistry

Description

vocabulary

Updated

2012-09-28T22:34:20Z

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