# Shared Flashcard Set

## Details

Gas Laws
Definitions, Key Ideas
9
Physics
03/11/2015

Term
 Explain the effect of decreased volume on the pressure of an ideal gas in terms of the kinetic model / in terms of particles.
Definition
 as volume decreases particles collide ____ frequently with the container walls so average force on container walls ________ pressure ________ since p =
Term
 pressure =
Definition
 the (perpendicular) ______ per unit ______ acting on a surface
Term
 density =
Definition
 the ____ per unit ________ of a material
Term
 Two assumptions of the ideal gas laws.
Definition
 fixed mass of gas (i.e. no new substance formed)  particles are considered as point masses (i.e. they have no volume of their own)
Term
 State which Gas Law requires one of the quantities to be inverted to obtain a straight line through the origin.
Definition
 Boyle's Law   OR   p1V1 = p2V2
Term
 Explain why temperatures must be expressed in kelvin, K rather than degrees celcius, oC when performing Gas Laws calculations.
Definition
 Pressure and temperature are not ________ proportional to one another unless the origin coincides with absolute zero.   Pressure and volume are not _______ proportional to one another unless the origin coincides with absolute zero.
Term
 To convert from oC to K:
Definition
Term
 Typical improvements to Gas Law experimental apparatus. With explanations.
Definition
 fully immerse flask in water to ensure gas is heated evenly place thermometer inside the flask to measure temperature of the gas directly reduce the length of rubber tubing to minimise any changes in volume due to increased / decreased pressure in the tubing
Term
 In the kinetic model an increase in temperature is explained by....
Definition
 ...increased (average) kinetic energy of the particles.
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