Posted by Anonymous on Sunday, April 10, 2011 at 12:44am.
A 828 mL sample of NO2 gas is at STP. If the volume changes to 598 mL and the temperature changes to 12ÂșC, what will be the new pressure in atmospheres?
new pressure=_____atm

chemistry  Jai, Sunday, April 10, 2011 at 12:55am
assuming the gas is ideal, we can use the formula,
P1*V1/T1 = P2*V2/T2
where
P1 = initial pressure
V1 = initial volume
T1 = initial temperature (in K)
P2 = final pressure
V2 = final volume
T2 = final temperature (in K)
we first convert the given temp to Kelvin units:
T2 = 12 + 273.15 = 285.15 K
*then note that at STP, temp is at 273.15 K and 1 atm. substituting,
P1*V1/T1 = P2*V2/T2
(1)(828) / 273.15 = (P2)(598) / 285.15
P2 = (828)(285.15) / (273.15)(598)
P2 = 1.45 atm
hope this helps~ :)

chemistry  Anonymous, Sunday, April 10, 2011 at 1:30am
thank you very much it does help a lot but when im doing this problems on my oown they dnt make any sense ..
Answer This Question
Related Questions
 jordan high  A sample of a gas at 0.63 atm occupies a volume of 324 mL. If the ...
 chemistry  A sample of ideal gas at room temperature occupies a volume of 32.0L...
 Chemistry  I need help on these last three problems on my Hw. 1. A 10.0 L ...
 CHEMISTRY  A sample of gas in a balloon has an initial temperature of 28 and a ...
 physics  A sample of gas at P = 1123 Pa, V = 1.41 L, and T = 291 K is confined ...
 CHEMISTRY  A GAS OCCUPIES A VOLUME OF 584 ML AT A PRESSURE OF 12.01K PA AND A ...
 chemistry  A sample of gas in a balloon has an initial temperature of 25\({\rm...
 chemistry  A sample of argon has a volume of 735 mL at a pressure of 1.20 atm ...
 Chemistry  If you have a sample of gas with a volume of 15mL and it changes to ...
 chemistry  A sample of gas in a balloon has an initial temperature of 9.0∘...
More Related Questions