I’ve just finished reading the book “The Science of Vapour Pressure” and am excited to share it with you. It’s a wonderful read and a great read to start with because it’s so easy to understand, yet not so simple to “get”. The author is a geophysicist and I’m sure you’ll find his insight easy enough.
Its a book I’ve been meaning to pick up for a while, but in the past Ive just been too intimidated by the complexity and technical jargon to really get past it. Now I realise Ive simply been doing a lot of reading and not really thinking about it in the right way, so its great to have the book to remind me that I need to learn to think a little more about things.
The author’s book is The Science of Vapour Pressure, which is a book about the physics of vapour pressure. It’s a comprehensive one, so you should definitely pick it up and peruse it.
Vapor pressure is a measure of the energy levels of a gas that is being forced to the surface of a container of gas. When you boil water, you are essentially forcing the pressure in the water to explode. The same thing happens when you vaporise any substance. You are forcing a pressure in the substance to explode. Vapour pressure is a measure of the maximum pressure that can be applied to a substance.
This is exactly what happens when you try to boil water. The vapor pressure is the pressure that can be applied to the water. If you boil water at a constant temperature, increasing the temperature will increase the pressure of the water. The same goes for the vapor pressure. As the temperature increases, the vapor pressure also increases. This is why the amount of pressure you can build up with a particular substance will always be proportional to the temperature.
The vapor pressure of something is proportional to the temperature squared. So the harder you try to push something (like air or hot water) the more difficult it is to get that pressure. However, on a cold day, the temperature of the water is still relatively high (like 10 degrees above absolute zero), so the pressure could be high, but the temperature is still low (like -20 degrees).
One of the ways we can relate this, to an extent, to the relationship between temperature and pressure, is that temperature and pressure are opposites that can exist at the same time. However, one of the things that temperature is often tied to is heat. For example, when you have a stove, it can bring heat to a room, but it can also raise the temperature by 3 degrees without significantly changing the amount of heat that comes from the stove.
The same goes for pressure. When you have a pipe on the ground, it can be filled with air, but it can also be filled with liquid. So when a liquid is pressureless, it doesn’t exert the same amount of pressure as air. However, when pressure is low, the pressure in the liquid is just as high as the pressure above it. So when you have a liquid, it can have a lower pressure, but it can also have a higher pressure than air.
When you have a pipe on the ground, it can be filled with air, but it can also be filled with liquid. When you have a pipe on the ground, it can be filled with air, but it can also be filled with liquid. So when you have a liquid, it can have a lower pressure, but it can also have a higher pressure than air.
For the most part, the only thing that can affect the pressure of liquids is the density of the liquid. The more dense the liquid, the less pressure there is. So you can see that the less pressure you have, the more you can pump. A lot of this is simply the difference in density between the liquid and air. So if the liquid is less dense, you can make more pressure by pumping the liquid.