Boyle's+law++Charles's+law

=***__BOYLE'S LAW__***=

In 1662, a scientist named by Robert Boyle discovered that gas pressure and volume are related mathematically and with his observation, it lead to the development of the gas laws where it was simply a mathematical relationship between the volume, temperature, pressure, and the amount of a gas. He conveys that by reducing the pressure on a gas by one-half allows the volume of the gas to double. To understand why the pressure-volume relationship holds is because of the use of the kinetic-molecular theory. Where the pressure of a gas is caused when the gas particles comes in contact with the walls of the container. As a result; when the volume is reduce, there will be more molecules per unit of volume and will cause more collisions with the walls of the container and the pressure will increase.




 * Boyle's Law:** States that the volume of a fixed mass of gas varies inversely with the pressure at constant temperature. In other words it means that if the volume decreases then the pressure increases.

Mathematically, Boyle's law can be expressed as: To solve pressure-volume problems use the following equation: P1 and V1 are considered the initial conditions While P2 and V2 signify a different set of conditions
 * PV=K**
 * **//P// stands for pressure**
 * **//V// stands for volume**
 * **//K// stands for constant**
 * P1V1=P2V2** and this depends on which variable you are solving for.
 * P1=first measurement for pressure
 * V1= first measurement for volume
 * P2= second measurement for pressure
 * V2= second measurement for volume




 * This picture above shows that if you decrease the volume then the pressure increases in the container.**

Here is a practice problem that you can do: remember that atm stands for atmosphere which is the unit for pressure.
 * PRACTICE PROBLEMS**

You have a substance that started with a pressure of 15 atm & a volume of 15 mL in the beginning, the new pressure is 25 atm. What is the new volume of the substance?

First you would identify the given: Pressure 1: 15 atm Volume 1: 15 mL Pressure 2: 25 atm

Next you would figure out what you are solving for: Solving for Volume 2 Equation going to be used: P1V1/P2 = V2

Then you are going to plug in the numbers where they belong in the equation

15 atm x 15 mL /25 atm=V2

Next you would cancel out the the atm because they are both on the top & the bottom & you are left in mL

Then you would would solve the equation

Finally you are left with an answer which is 9 mL for V2, as the new volume.