How Do Volume, Pressure, and Temperature Interact in a Gas?

In summary, the conversation discusses the relationship between pressure, volume, and temperature in a gas container. It explains that for a given amount of gas, PV/T remains constant. Changing one variable while leaving the others constant will result in a change in the third variable. This is demonstrated with an example of increasing temperature and the resulting increase in pressure. The conversation also mentions the danger of throwing an aerosol can into a campfire, as it can cause an increase in pressure and potentially lead to an explosion.
  • #1
tommy1
6
0
can someone explain the the relationship these have to each other? i know that they are either proportional or inverse proportional but i don't know which ones are. Thanks
 
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  • #2
For a given amount of a gas in a container, PV/T stays constant.

Try leaving anyone thing alone and change one thing, and you can see what happens to the third thing; for example, leave T alone, decrease V, then P must increase. Does it make sense? Does squeezing a gas into a smaller container make its pressure go up? Check.

Why it's dangerous to throw an aerosol can into a campfire. Leave V alone, and increase T, so then P must increase. Kaboom!
 
Last edited:
  • #3
mikelepore said:
For a given amount of a gas in a container, PV/T stays constant.

Try leaving anyone thing alone and change one thing, and you can see what happens to the third thing; for example, leave T alone, decrease V, then P must increase. Does it make sense? Does squeezing a gas into a smaller container make its pressure go up? Check.

Why it's dangerous to throw an aerosol can into a campfire. Leave V alone, and increase T, so then P must increase. Kaboom!

oooo ok. thanks man. you also just unintentionally helped me with a worksheet question i was struggling with! thanks again.
 

1. What is the relationship between volume, pressure, and temperature?

The relationship between volume, pressure, and temperature is described by the ideal gas law, which states that the product of pressure and volume is directly proportional to the absolute temperature of a gas, assuming constant amount of gas and no phase change.

2. How does changing the volume affect pressure and temperature?

Changing the volume of a gas can affect both pressure and temperature. If the volume increases, the pressure will decrease, and vice versa. Additionally, if the volume increases while the temperature remains constant, the pressure will also decrease. However, if the volume and temperature both increase, the pressure will remain constant.

3. Can volume, pressure, and temperature all be changed simultaneously?

Yes, all three factors can be changed simultaneously. The ideal gas law states that as long as the amount of gas remains constant, the product of pressure and volume will be directly proportional to the temperature. This means that if one factor is increased, at least one of the other two factors must also be changed to maintain proportionality.

4. How does the volume of a gas change with temperature?

The volume of a gas is directly proportional to its temperature. This means that as the temperature increases, the volume of the gas will also increase. Similarly, as the temperature decreases, the volume of the gas will decrease.

5. How does temperature affect the pressure of a gas?

Temperature and pressure have a direct relationship in gases. As the temperature increases, the kinetic energy of the gas particles also increases, causing them to collide more frequently and with more force, resulting in an increase in pressure. Conversely, as the temperature decreases, the pressure will also decrease.

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