We are learning the lesson about gases/gaseous states at our school and I couldn't help but wonder, why learn about IDEAL GASES...... How do ideal gases help us to analyze about real gases?
Thank you very much for helping. I really appreciate it.Well, you could study lots of tables of experimental P,V,T data. But that's a lot of numbers, and wouldn't give you much understanding.
The ideal gas is a simple model that often (not always) gives a good approximation to the behaviour of real gases, in terms of a few basic physical principles, that hopefully gives the student an insight into the basic processes going on in gases, and how these affect their physical properties. When the behaviour of real gases is not ideal, it is often convenient to treat it as ideal with some small deviations due to factors not taken account of in the ideal model. Thus the van der Waals equation has terms to correct for the volume of the molecules and the intermolecular forces, both of which are relatively very small in near-ideal conditions. The vdW equation is itself a model, not an exact description of a real gas. The only such description is experimental data, but that in itself doesn't give understanding, as I said, or make it easy to predict the properties in different conditions. A model, such as the ideal gas or van der Waals gas, helps to do that. that is what makes it science as distinct from mere observation.