When an evacuated tube of volume 400 cm is filled with gas at 300 K an

1.	When an evacuated tube of volume 400 cm is filled with gas at 300 K and 101 kPa, the mass ofthe tube increases by 0.65 g.Assume the gas behaves as an ideal gas.What could be the identity of the gas?
Answer» <P>Answer: GIVEN:- Pressure (P)=103kPa≈1atm Volume of gas (V)=5.37×10−3m3=5.37L Temperature (T)=60℃=273+60=333K No of moles of methane (n)=? now, using ideal gas LAW, PV=nRT 1×5.37=n×0.0821×333 ⇒n≈0.2 mol Now, Molecular MASS of methane (M)=16g Therefore, Mass of SAMPLE of methane =n×M=0.2×16=3.2g

When an evacuated tube of volume 400 cm is filled with gas at 300 K and 101 kPa, the mass ofthe tube increases by 0.65 g.Assume the gas behaves as an ideal gas.What could be the identity of the gas?

Answer»

<P>Answer:

Pressure (P)=103kPa≈1atm

Volume of gas (V)=5.37×10−3m3=5.37L

Temperature (T)=60℃=273+60=333K

No of moles of methane (n)=?

now, using ideal gas LAW,

PV=nRT

1×5.37=n×0.0821×333

⇒n≈0.2 mol

Now,

Molecular MASS of methane (M)=16g

Therefore,

Mass of SAMPLE of methane =n×M=0.2×16=3.2g