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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: gamer on November 17, 2019, 09:42:39 AM

Title: Ideal Gas Problem given volume and temperature
Post by: gamer on November 17, 2019, 09:42:39 AM

On my lab assignment, I was given the question, "A sample of gas has a volume of 5.33L at a temperature of 112°C, determine the temperature (in Kelvin) at which it will have a volume of 7.32L


After attempting to put the values given into the equation P₁V₁/T₁=P₂V₂/T₂
The equation with substituted numbers looked like:

(1atm)(5.33L)/385.15K=(1atm)(7.32L)/T₂ 
And solving for T₂ It was  T₂ = (1atm)(5.33L)/(385.15K)(1atm)(7.32L)

I ended up with 0.00189 K which, I'm guessing, is not the right answer.

I'm wondering if I set it up wrong, or there are some values from the STP conditions that I didn't include, or something else. If someone could help me with this, it would be greatly appreciated. Thank you.

Title: Re: Ideal Gas Problem given volume and temperature
Post by: Borek on November 17, 2019, 09:53:49 AM

Hard to tell what you did wrong not seeing the numbers. Can be anything.

Title: Re: Ideal Gas Problem given volume and temperature
Post by: gamer on November 17, 2019, 10:04:59 AM

Added the numbers...

Title: Re: Ideal Gas Problem given volume and temperature
Post by: AWK on November 17, 2019, 10:11:02 AM

The volume is less than 40% larger and the temperature should be higher by about 150 degrees.

Title: Re: Ideal Gas Problem given volume and temperature
Post by: Borek on November 17, 2019, 10:57:34 AM

Recheck the algebraic part.

Title: Re: Ideal Gas Problem given volume and temperature
Post by: mjc123 on November 18, 2019, 04:24:17 AM

You've calculated 1/T2.