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- Absolute Temperature - temperature measured from absolute
zero, where all motion stops.
- Atmosphere (atm) - the amount of pressure exerted by the
at sea level. Approximately 15 psi, 760 mm Hg, 760 torr, or 101.3 kPa.
- Diffusion - when particles move from an area of high to lower concentration
- Directly Proportional - a relationship in which one variable goes up if the other goes up, and down if the other goes down.
- Effusion - when gas molecules escape from their container through
tiny holes in the container.
- Elastic - in terms of collisions, one in which no energy is lost
- Equilibrium - A dynamic state in which two opposing processes take
place at the same time and the same rate.
- Gas - the state of matter characterized by neither a definite
shape nore volume.
- Hypothesis - 1) an educated guess, 2) a scientific theory unproven by experimentation, 3) (common) a theory (but not that in science!)
- Inversely Proportional - a relationship in which one variable goes up as the other goes down
- Kelvin - 1) Temperature on the Kelvin scale which is numerically
273 degrees higher than that of the Celcius scale. 2) Scale based on
- Kinetic Energy - 1) energy of motion, 2) the energy that a moving object has,
3) the quantity of energy equal to half mass times velocity squared
- Kinetic Theory - A basic set of assumptions for
gases and gas behavior. The five assumptions are:
- Gases are made of molecules in constant, random movement. Gases like
Argon have 1-atom molecules.
- The large portion of the volume of a gas is empty space. The volume
of all gas molecules, in comparison, is negligible.
- The molecules show no forces of attraction or repulsion.
- No energy is lost in collision of molecules; the impacts are
- The temperature of a gas is the average kinetic energy of all of the
- Means and Extremes - a term used in relation to proportions. In proportion W/X=Y/Z, W and Z are extremes and X and Y means. According to rules of proportions, a proportion is true if the product of the means equals the product of
the extremes. Also, in a proportion, the means or extremes can be switched (eg. W/X=Y/Z becomes Z/X=Y/W).
- Mole - a quantity equal to 6.023 x 1023
- Molecule - the smallest particle of a substance that still retains all of the
properties of that substance (assuming a 1-atom particle, like Ar, is a molecule).
- Pressure - the amount of force exerted on an object
- Standard Temperature and Pressure (STP) - 1) a standard for measuring properties of gases, 2) A state of pressure equal to 1 atmosphere (760 mm Hg/101.3 kPa) and
at 273 K (water's freezing point).
- Surface Area - the amount of two dimensional space on the face of an object
- Temperature - 1) A measure of the ability of a system to
heat to, or acquire heat from, other systems. 2) The average molecular
kinetic energy of a substance
- Volume - the amount of three-dimensional space an object occupies
Team # 12596
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