gas laws..

[nid404]

1) An iron cylinder contains He at a pressure of  250KPa at 300K. the cylinder can withstand a pressure of 1X10^6 Pa. The room in which the cylinder is placed catches fire. Predict whether the cylinder will blow up before it melts or not.....

2) The density of a gas at 27 degrees celcius and 760mm pressure was found to be 3g/l. Find out the temperature at which the density will become 2.4g/l, keeping pressure constant


Please answer


Thanks

[nid404]

okay I actually got the second one but want to confirm if it is 375K

Please answer the first one....astar..or adi and slvri

[astarmathsandphysics]

In bed. Will answer when i get up.

[nid404]

okay....take ur time

[astarmathsandphysics]

1) An iron cylinder contains He at a pressure of 300K. the cylinder can withstand a pressure of 1X10^6 Pa. The room in which the cylinder is placed catches fire. Predict whether the cylinder will blow up before it melts or not.....

2) The density of a gas at 27 degrees celcius and 760mm pressure was found to be 3g/l. Find out the temperature at which the density will become 2.4g/l, keeping pressure constant

1/ the volume is constant since it is the volume of the room.
so
Much more borderline than before, but still I say it wont melt.I think it will not melt since the temp of the fire is typically up to 1000K so the pressure will be less than 10^6

2)P₁/d₁=P₂/d₂
temp will be 2.4/3 *300=240K

[nid404]

Sorry I made a blunder

I've modified the question

[nid404]

I've modified it...please answer

[slvri]

1) An iron cylinder contains He at a pressure of  250KPa at 300K. the cylinder can withstand a pressure of 1X10^6 Pa. The room in which the cylinder is placed catches fire. Predict whether the cylinder will blow up before it melts or not.....

2) The density of a gas at 27 degrees celcius and 760mm pressure was found to be 3g/l. Find out the temperature at which the density will become 2.4g/l, keeping pressure constant


Please answer


Thanks

this is physics right..........u guys are already so far ahead? i dont know how to answer this q cuz i aint studied this.........sory

[astarmathsandphysics]

I modified my post too.

[nid404]

thanks sir


but shouldn't the second  be  1/T₁d₁=1/T₂d₂


considering vapour density

[nid404]

this is physics right..........u guys are already so far ahead? i dont know how to answer this q cuz i aint studied this.........sory

No problem slvri

[astarmathsandphysics]

pV= K but d=m/V soV=M/d so p/d=K

[nid404]

pV= K but d=m/V soV=M/d so p/d=K

In this case the pressure is constant

so isn't it

t1d1=t2d2
300KX3=2.4Xt2
t2=375K

I'm confused

[astarmathsandphysics]

it says in the question the pressure is constant

[nid404]

another question

0.23g of a volatile solute displaced 112ml of air at  NTP. Calculate the vapour density and the molecular weight of the substabce