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Chemistry exam 4
Terms in this set (36)
loss of electrons
gain of electrons
The electron acceptor in a redox reaction.
The electron donor in a redox reaction.
a reaction that involves the transfer of electrons between reactants
A mixture that forms when one substance dissolves another.
the substance that is dissolved
the substance in which the solute dissolves
a solution in which water is the solvent
moles of solute/liters of solution
system and surroundings
- System: the particles/objects under observation.
- Surroundings: everything with which the system can exchange energy.
- If a system loses energy, the surroundings gain the exact same amount of energy, and vice versa.
A reaction in which energy is absorbed. positive enthalpy
A reaction that releases energy in the form of heat. negative enthalpy
A function that depends only on the initial and final states of a system, not on the path in between.
total energy of a system
when reactants are converted to products, the change in enthalpy is the same whether the reaction takes place in one step or in a series of steps
standard heat of formation
the change in enthalpy that accompanies the formation of one mole of a compound from its elements with all substances in their standard states at 25 degrees celsius.
standard heat of formation equation
sum (n delta H products)- sum (n delta H reactants)
Gases expand to
fill their containers
Gases take the shape of
gases have low
mixtures of gases are always
kinetic molecular theory
based on the idea that particles of matter are always in motion
the escape of gas molecules from a container to a region of vacuum
the mixing of gases as the result of random motion and frequent collisions
the amount of force applied per unit of area
760 mmHg, 760 torr
temperature for gases is always in
total kinetic energy
average kinetic energy
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