# Shared Flashcard Set

## Details

Ideal Gases
A Level OCR Physics A Revision - The Newtonian World
14
Physics
Not Applicable
12/09/2012

Term
 State Boyle's Law
Definition
 At a constant temperature, the pressure p and volume v of a gas are inversely proportional
Term
 State Charles' Law
Definition
 At constant pressure p, the volume V of a gas is directly proportional to its absolute temperature
Term
 State the Pressure Law
Definition
 At constant volume V, the pressure p of a gas is directly proportional to its absolute temperature T
Term
 Which constant do you achieve if you combine all three gas laws?
Definition
 p(v/T) = constant
Term
 What is the Ideal Gas equation?
Definition
 pV = nRT
Term
 In the Ideal Gas equation, what does R represent?
Definition
 R = molar gas constant (8.31Jmol-1 K-1)
Term
 In the Ideal Gas equation, what does n represent?
Definition
 n = number of moles
Term
 In the equation of State, what does N represent?
Definition
 N = number of particles  (N = nNA)
Term
 What does k represent in the equation of state?
Definition
 k = Boltzmann's Constant (R/NA)
Term
 What is the equation of State?
Definition
 pV = NkT
Term
 Describe how a gas exerts pressure on the walls of its container
Definition
 >Particles have random motion & no attractive forces between them therefore move with constant velocity according to N1L   > N3L; particles collide with wall which exerts equal & opposite force on particles. They also collide with each other   >N2L - change in momentum when particles collide with wall; a force proportional to its mass and velocity.   >Lots of particles exerting forces on each other and the wall therefore steady, even force which causes a pressure on the container.
Term
 State the assumptions of Kinetic Theory
Definition
 Gas contains a large number of particles Particles move rapidly and hapharzardly Motion of particles follows Newton's laws There're no attractice forces between the particles Collisions between particles and walls, and between particles themselves are perfectly elastic Any forces acing during collisions and instantaneous Particles have negligible volume compared with the volume of the container
Term
 Describe an experiment you could use to demonstrate Brownian Motion
Definition
 Put some smoke in a glass cell and shine a beam of light onto it. Use a microscope to to view the smoke particles
Term
 How do you convert from Celsius to Kelvin in degrees?
Definition
 K = C + 273.15
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