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

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Cards

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
  1. Gas contains a large number of particles
  2. Particles move rapidly and hapharzardly
  3. Motion of particles follows Newton's laws
  4. There're no attractice forces between the particles
  5. Collisions between particles and walls, and between particles themselves are perfectly elastic
  6. Any forces acing during collisions and instantaneous
  7. 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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