What is the density of fluorine gas at STP?

Question

a.) .848 g/L
b.) 1.55 g/L
c.) 1.70 g/L
d.) 1.85 g/L

please show work!

Answer 1

I get 1.69522 g/L, using constants with the most significant figures I can find:

N/V = P/(R*T)
P = 101.325e3 Pa
V = 1 m^3
R = 8.314472
T = 273.15 K

N/m^3 = 44.6149 mol/m^3 = 0.0446149 mol/L
1 mol of F2 = 37.9968 g
0.0446149*37.9968 = 1.69522 g/L

If I use 100 KPa (1 bar) as standard pressure, I get 1.67305 g/L

The difference in the values given in the answer and the "Handbook of Chem. & Physics" is apparently due to the shift from 1 atm to 1 bar as the definition of "standard pressure."
I think the slight difference in my calculated value and the published one may be due to the fact that when you start getting out to that many decimal places even "ideal gases" aren't totally ideal....maybe I should try the Redlich-Kwong EOS...

Oooooops! I didn't want to do your homework for you...maybe I should erase all this....:)

Answer 2

Fluorine Density

Answer 3

Density Of Fluorine

Answer 4

The Handbook of Chemistry and Physics gives the density of fluorine gas as 1.667 grams per Liter and this is usually given at STP.There was no "work" involved; I just looked it up.

Answer 5

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The molar density of any ideal gas at STP is: 1 mol / 22.4 L = 0.04464 mol / L The molar mass of F2 is: 2(19) = 38 g/mol 0.04464 mol / L * (38 g / mol) = 1.70 g/L

Answer 6

At STP : pressure = 1 atm and T = 273 K Molar mass = d x RT / p = 2.176 x 0.0821 x 273 / 1 atm = 48.77 g/mol This is not enought to find the formula

Answer 7

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RE:
What is the density of fluorine gas at STP?
a.) .848 g/L
b.) 1.55 g/L
c.) 1.70 g/L
d.) 1.85 g/L

please show work!

Answer 8

It is 0.848 g/L
density = mass/volume
volume of 1 mol of a gas at STP is always 22.4 L so since Florine has 18.998 g
Therefore d=18.998/22.4 = 0.848 g/L