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 BOYLE ' LAW 

Boyle’s Law, an ideal gas law which states that the volume of an ideal gas is inversely proportional to its absolute pressure at a constant temperature. The law applies only to ideal gases which allow only pressure and volume to change.

In other words, the product of pressure and volume is constant for a fixed mass of ideal gas at fixed temperature.

                                                               P1 X V1 = P2 X V2

The other way to express Boyle’s Law is as follows

Where

•    P denotes pressure of the gas
•    V denotes volume of the gas
•    K is constant and holds units of force times and distance. 

BOYLE ' S LAW FORMULA 

According to this law, at a constant temperature, the product of pressure and volume is a constant:

PV = c

o

P ∝ 1/V

EXAMPLE FOR BOYLE ' S LAW PROBLEM

	Boyle's Law
	pressure at state 1
	volume at state 1
	pressure at state 2
	volume at state 2

(1)  A 1 L volume of a gas is at a pressure of 20 atm. A valve allows the gas to flow into a 12 L container, connecting the two containers. What is the final pressure of this gas?

A good place to start this problem is to write out the formula for Boyle's law and identify which variables you know and which remain to be found.

The formula is:

P₁V₁ = P₂V₂

You know:

Initial pressure P₁ = 20 atm
Initial volume V₁ = 1 L
final volume V₂ = 1 L + 12 L = 13 L
final pressure P₂ = variable to find

P₁V₁ = P₂V₂

Dividing both sides of the equation by V₂ gives you:

P₁V₁ / V₂ = P₂

Filling in the numbers:

(20 atm)(1 L)/(13 L) = final pressure

final pressure = 1.54 atm 

                                                         GRAPH FOR THE BOYLE ' S LAW