What Is the Pressure of 3.2gm of O2 Gas in a 4000ml Container at 100°C?

[Heila]

i need help with this two problems

Homework Statement

calculate the pressure of 3.2gm of O₂ gas in acontainer its volume 4000ml at 100^oC knowing that the molucul mass for O₂ = 16u

Homework Equations

The Attempt at a Solution

PV=nRT
P=3.2x8.314x373x1000000 /(16x2x4000 )

Homework Statement

At atmospheric pressure and at 0^oC and the molecule mass for Nitrogen is 28 u so the volume for 1Kg mol equal

Homework Equations

The Attempt at a Solution

PV=nRT
V = 273x8.314 /28x1.o13x10⁵

 

[LowlyPion]

Welcome to PF.

What do you seem to be having trouble with?

What units are your answers supposed to be?

 

[Heila]

Welcome to PF.

What do you seem to be having trouble with?

What units are your answers supposed to be?

I just want to know if my answer in correct


for the first problem 'Pa' and the second 'm³/Kg mol'

 

[LowlyPion]

I just want to know if my answer in correct

for the first problem 'Pa' and the second 'm³/Kg mol'

The first one looks like it is set up OK for Pa.

Volume though is generally given as m³ or L.

I'm not sure what you mean by "m³/Kg mol"

 

[Heila]

The first one looks like it is set up OK for Pa.

Volume though is generally given as m³ or L.

I'm not sure what you mean by "m³/Kg mol"

so it is o.k if i just used m³ right ..??


thanks for your help

 

[LowlyPion]

so it is o.k if i just used m³ right ..??

thanks for your help

I'd say it is set up OK for finding the volume of 1 kg of N gas, if that is the question.

But I hesitate with your statement "the volume for 1Kg mol equal "

 

[Heila]

I'd say it is set up OK for finding the volume of 1 kg of N gas, if that is the question.

But I hesitate with your statement "the volume for 1Kg mol equal "

sorry I'm lost here ..
you mean if the question says the volume of 1 kg of N gas then m³ is correct, but what about is the question says the volume for 1Kg mol equal then is it o.k if i used m³/Kg mol or not ..

 

[LowlyPion]

sorry I'm lost here ..
you mean if the question says the volume of 1 kg of N gas then m³ is correct, but what about is the question says the volume for 1Kg mol equal then is it o.k if i used m³/Kg mol or not ..

I was merely pointing out that the statement of the problem is suggesting something different.

1 kg mol of a substance is 1kg*Molecular mass.

So for your problem with Nitrogen at 28, this suggests that you would use 28 kg of gas, not 1 kg.

Your answer looks to me like it's off by a factor of 28.