# Volume pressure and temperature relationship of water

### Boyle's law - Wikipedia

To understand the relationships among pressure, temperature, volume, and the amount As the pressure on a gas increases, the volume of the gas decreases . why it is dangerous to heat even a small quantity of water in a sealed container. The same pressure and temperature relationship is required to produce either Water boils at °F at the atmospheric pressure of psia, at 80°F under a. Pressure, temperature, and volume relation in liquids Water temperature is 20 degrees celsius (room temp) in the pipe originally, and a.

At the other end of the pipe is the incoming city water company city pressure. Water temperature is 20 degrees celsius room temp in the pipe originally, and a pressure of "1".

Then the city increases water pressure to "2". The units do not matter, just say the pressure doubled. The water did not move, because the tap was shut.

Relationship Between Vapor Pressure and Temperature

Yet the static pressure doubled. Would the temperature rise, twice as much to 40 degrees celsius due to the pressure increase? For simplicity, let's say the copper pipe never expanded and none of the taps can leak.

Liquids transmit pressure - but, when they are not moving, AFAIK they hold a static pressure, almost like a "charge". I wonder if since liquids are virtually incompressible, an increase in static pressure causes the liquid to heat up ideally.

We could think of a liquid under pressure like a gas under pressure which cannot change volume, due to its special container that doesn't let it change volume the liquid itself! Yes, but ideal liquids? As for solids - well supposedly the fairly solid "earth" is under pressure causing tremendous heat in the center - kind of empirical evidence that pressure causes heat in solids.

So this might answer my question - but still! I have to ask about liquids specifically too. The volume of the can is constant.

## Water's Unexpected Properties

When contents are removed from the can, then the mass of the contents will be reduced in the can. Because there is less mass in the can with a constant volume, the pressure will decrease.

This pressure decrease in the can results in a temperature decrease. The contents coming out of the can also cool in temperature but for another reason.

### PRESSURE AND TEMPERATURE RELATIONSHIP

Outside of the can the volume is not held constant. Thus the contents are free to expand when they move from the high pressure in the can to the low pressure outside of the can. Expansional cooling causes the contents coming out of the can to cool.

This effect can be noticed in spray-on deodorants.