A sample of oxygen gas occupies 320.0 mL at 27ºC and atmospheric pressure. What volume does it occupy at 120ºC and the same pressure?
2007-01-31 03:14:44 · 3 answers · asked by MEB 2 in Science & Mathematics ➔ Chemistry
A. 1.67 L
B. 4.7 L
C. 150 mL
D. 419 mL
E. 213 mL
2007-01-31 03:42:04 · update #1
Convert temperature to kelvin then use
P1V1/T1=P2V2/T2
you know that P1=1atm=P2 so P1 and P2 cancel
V1 = 320ml
T1 = 27 = 300kelvin
T2 = 120 = 393 kelvin
so, V2=V1T2/T1
V2=320 x 393 / 300
V2 = 419.2ml
2007-01-31 03:36:25 · answer #1 · answered by ??????????? 2 · 0⤊ 0⤋
Law of the perfect gases
pV=nRT
p=pressure
V=volume of the gas
n=number of moles
R=constant
T=temperature (in kelvins)
now do the calculations ! It's easy
2007-01-31 11:23:41 · answer #2 · answered by scientific_boy3434 5 · 0⤊ 0⤋
USE THIS WHEN ANYTHING CHANGES IN THE SITUATION
Use the combined gas law, sub in what you know, and cancel out what you don't (only if don't know both)
(P1xV1) / (P2xV2) = (n1xT1) / (n2xT2)
The perfect gas law only works when temp, etc is constant
2007-01-31 11:26:31 · answer #3 · answered by ҡʏʟɛ - ❄ 6 · 0⤊ 0⤋