Thermal physics covers macroscopic (whole systems) and microscopic (particles) processes. During this topic you will be develop a better understanding of the following questions and more:
- What is the evidence that everything is made of atoms?
- What is the difference between heat and temperature?
- What is the relationship between heat added and temperature increase?
- Why doesn´t the temperature of water change when it boils?
- What are the gas laws?
- How do you use a P-V diagram?
- Where does the energy go when work is done against friction?
Because there are no forces between gas molecules, the gaseous state is the simplest to model. We will start by considering the molecules but then look at the bigger picture of the relationship between pressure volume and temperature.
It is clear that to melt ice and boil water you need to add heat but where does that energy go? It seems to be hidden hence the name latent heat.
If matter is made up of atoms then we should be able to explain all the properties of matter in terms of their motion. This includes the states of matter, forces and Brownian motion.
Whether you want to prevent heat from escaping, increase it´s flow or answer an exam question you need to know the processes of heat transfer, conduction, convection and radiation.
Boyle's law sounds like it's got something to do with boiling but it hasn´t. It's the law where temperature is constant. An easy experiment to do if you have the right apparatus.
"Heating up, cooling down." "Turn up the heat." "Raise the temperature." The words temperature and heat sound like they mean the same thing but they don´t. It is important that when used in physics we are clear of the difference.