# Boyle's Law

### By: Connor Wagner

## Concept of Boyle's Law

Boyle's Law states that the product of the pressure and volume for a gas is a constant for a fixed amount of gas at a fixed temperature. Written in mathematical terms, this law is

*P V*=

*constant*

## The use in Boyle's law

A common use of this law is to predict how a change in pressure will alter the volume of the gas or vice versa. Such a problem can be regarded as a two state problem: the initial state (represented by subscript *i*) and the final state (represented by subscript *f*). If a sample of gas initially at pressure *Pi* and volume *Vi* is subjected to a change that does not change the amount of gas or the temperature, the final pressure *Pf* and volume *Vf* are related to the initial values by the equation

*Pi Vi*=

*Pf Vf*

## Some pictures of Boyle's Law

## Practicing Boyle's Law is fun!

## Try this!

If a gas at 25c occipies 3.6 liters at a preausre of 1 atm, what will be its volume at a pressure of 2.5 atm?