Saturday

March 28, 2015

March 28, 2015

Posted by **Anna** on Sunday, November 9, 2008 at 3:57pm.

What is the equation?

- AP Chem -
**Trig**, Sunday, November 9, 2008 at 4:03pmAlways start with PV/nT = PV/nT, where P is the pressure, V is the volume, n is the number of moles, and T is the temperature. Take out whichever terms you don't need. In this case, you don't need n (the number of moles), so you're left with:

PV/T = PV/T

Solve for the V on the right side of the equation after you plug in everything else.

- AP Chem -
**Anna**, Sunday, November 9, 2008 at 4:12pmI did that and got -22.7.

1st of all the answer is supposed to be .65 L

2nd of all where does the negative go?

- AP Chem -
- AP Chem -
**Trig**, Sunday, November 9, 2008 at 4:09pm( You only use PV=nRT when none of the variables change. In this case the temperature is changing, so you use PV/nT = PV/nT )

- AP Chem -
**Trig**, Sunday, November 9, 2008 at 4:25pmTemperature must always be in Kelvin! Add 273 to the temperature in Celsius to get the temperature in Kelvin. In this case:

INITIAL TEMPERATURE = 22+273 = 295 K

FINAL TEMPERATURE = -197+273 = 76 K

- AP Chem -
**Anna**, Sunday, November 9, 2008 at 4:28pmooh ok that explains it lol thanks =]

- AP Chem -

**Answer this Question**

**Related Questions**

AP Chem - Can someone please check these problems? 34. You fill a balloon with ...

Chem hw! - 1. What pressure would be needed to compress 25.1 mL of hydrogen at 1...

Chem hw! - 1. What pressure would be needed to compress 25.1 mL of hydrogen at 1...

chemistry homework help!! - many gases are shipped in high pressure containers. ...

sciencee - 1. What pressure would be needed to compress 25.1 mL of hydrogen at 1...

Chemistry - 1. Calculate the number of molecules in a deep breath of air whose ...

Chemistry - Many analytical instruments require liquid nitrogen. While filling ...

Chem - Can you please tell me if these are right? A gas has a volume of 2.8 L at...

chemistry - Many analytical instruments require liquid nitrogen. While filling ...

Physics - The boiling point of helium at 1 atm is 4.2 K. What is the volume ...