Lesson Notes By Weeks and Term v4 - SHS 3
MATTER AND ITS PROPERTIES
Download the Lessonotes Mobile Ghana app for faster lesson access on Android and iPhone.
MATTER AND ITS PROPERTIES
Download the Lessonotes Mobile Ghana app for faster lesson access on Android and iPhone.
Subject: Chemistry
Class: SHS 3
Term: 2nd Term
Week: 2
Grade code: 1.1.1.LI.5
Strand code: 1
Sub-strand code: 1
Content standard code: 1.1.1.CS.3
Indicator code: 1.1.1.LI.5
Theme: PHYSICAL CHEMISTRY
Subtheme: MATTER AND ITS PROPERTIES
This page supports the lesson note with a companion video and a short classroom-ready summary.
For class groups and homework, share this lesson page so learners also get the summary, objectives, and full lesson context.
In our previous studies, we learned about the Ideal Gas Law (PV=nRT), a simple and powerful tool for describing the behaviour of gases. However, this law is based on a set of "ideal" assumptions that are not always true in the real world. In real life, especially in important Ghanaian industries like the processing of natural gas at the Atuabo Gas Plant or filling the LPG cylinders we use in our homes, gases are often under high pressure and varying temperatures. Under these real conditions, they do not behave ideally. This lesson will explore *why* real gases deviate from the predictions of the Ideal Gas Law.
A. Recap: The Ideal Gas and its Assumptions
An ideal gas is a hypothetical gas that perfectly obeys all the assumptions of the Kinetic Molecular Theory. Its behaviour is perfectly described by the Ideal Gas Equation:
PV = nRT
Where: P = Pressure V = Volume n = number of moles R = Ideal Gas Constant (8.314 J/mol·K or 0.0821 L·atm/mol·K) T = Absolute Temperature (in Kelvin)