# science

What is Boyle's and char?les's Law

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Ms. Sue
1. This is something you can look up in your text but here they are.
Boyle's law==The volume of a gas at constant temperature is inversely proportional to the pressure.
Charles' law==The volume of a gas at constant pressure is directly proportional to the temperature.
Check it out in your text to make sure I have it correct.

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2. I'm in 5th grade they don't let us take home the books - If in Charles's law when temperature of a gas increases if you keep pressure constant then what happens?

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3. Thanks for letting me know your grade. That helps. In my first response, I wrote that Charles' law states volume and pressure are directly proportional. Directly means that when one goes up the other one goes up. When one goes down, the other goes down. Therefore, if T increases, volume increases. If T decreases, volume decreases. One thing to remember is that decreasing T from say 200 C to 100 C will NOT decrease volume by 2 BECAUSE the T must be measured in Kelvin, not Celsius. We can convert 200 C to 273 + 200 = 473 Kelvin and 100 C to 273 + 100 = 373 Kelvin. So decreasing T from 200 C to 100 C will decrease the volume from whatever it was to that number times (373/473). I hope this helps.

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