Solve Thermodynamics Problem: Find Mass of Gas Leaving Open Container

[lajirai]

Homework Statement

An Open container of volume V contains an ideal gas having molar mass M. If the temperature of the container is raised from T1 to T2, what mass of the gas will leave the container ? Assume that the gas pressure in the container is maintained at P.

Homework Equations

The Attempt at a Solution

I tried but failed. could anyone help me get the solution.
Thanks

 

[G01]

You have to show your work in order to get help here. What have you tried? I can't find you mistake without seeing your work.

 

[DanAbnormal]

I had this exact question on my thermal physics paper, not sure if I got it right though.

As it is, I am currently redoing the paper so I've attempted this too.

From PV = nRT

n = m/M, where m is mass of substance, and M is molar mass.

so PV = (m/M)RT

rearrange: m = PVM/RT.
That'll be the mass of the gas inside the container, I believe.

Not sure about the rest of it though, I am sure there's stuff to do with V1/T1 = V2/T2, and I've had a play around with them but I am not sure about a final answer.

 

[sp1408]

Simply use the fact that because p,v are constant and pv=nrt,nt is constant,calculate initial moles from pv=nrt(p,v,t given,r is known).then calculate final no. of moles(again everything is given,(n1-n2)*M is the mass of the gas that left.
If you don't get the answer by this,then the question is wrong or the answer given in the book is wrong...