Gas laws

CHEMISTRY  SSS1 Second Term

WEEK 6

Gas laws

Performance Objectives

The student should be able to:

1. State Boyles and Charles law
2. Solve calculations on Boyle’s and Charles law
3. Solve calculations on general gas equation

Content

Boyle’s law

Boyle’s law states that the pressure of a fixed mass of gas is inversely proportional to the volume provided the temperature remains constant.

Graphical representation of Boyle's law

I.e. P α 1/V

P = K/V

PV = K

Hence, P₁V₁ = P₂V₂

Worked example 1

200cm³ of a gas has a pressure of 500mmhg. What will be its volume if the pressure was increased to 780mmhg, assuming the temperature is constant.

Solution

P₁ = 510mmhg

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