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Chemistry Forums for Students => High School Chemistry Forum => Chemistry Olympiad and other competitions => Topic started by: yuheng_wu on December 16, 2020, 04:37:27 AM

Title: Ideal gas law question
Post by: yuheng_wu on December 16, 2020, 04:37:27 AM

Could someone please tell me what I am doing wrong? The question is: "5,00 liters of a gas at a temperature of 25,0 degrees Celcius and 0,500 atmospheric pressure is compressed to a volume of 1,00 liters and the temperature is not changed. What is the new pressure in that situation?"
I have attached my answer. The correct answer is 2,50. 10^5 𝑃a.
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Title: Re: Ideal gas law question
Post by: AWK on December 16, 2020, 05:01:20 AM

Constant temperature, so gentlemen Boyle and Mariotte bow.
In addition, 5 liters of gas at 0.5 atm pressure is about 0.1 mole of gas.

Title: Re: Ideal gas law question
Post by: yuheng_wu on December 16, 2020, 05:12:56 AM

Quote from: AWK on December 16, 2020, 05:01:20 AM

Constant temperature, so gentlemen Boyle and Mariotte bow.
In addition, 5 liters of gas at 0.5 atm pressure is about 0.1 mole of gas.

Thank you very much for your answer. Does that mean that this ideal gas formula cannot be used when the temperature is constant?

Title: Re: Ideal gas law question
Post by: AWK on December 16, 2020, 05:16:36 AM

The ideal gas law can always be applied to an ideal gas as long as it is done without error. But sometimes there are simpler calculations.