A given volume of ozonised oxygen (containing 60% oxygen by volume) re...
**Given Information:**
- The volume of ozonised oxygen required 220 sec to effuse.
- An equal volume of oxygen took 200 sec to effuse.
- The ozonised oxygen contains 60% oxygen by volume.
- The density of O2 is 1.6 g/L.
**To find:**
Density of O3.
**Solution:**
Effusion is the process of a gas escaping through a small hole into a vacuum. According to Graham's law of effusion, the rate of effusion of a gas is inversely proportional to the square root of its molar mass.
**Step 1: Calculate the molar mass of O2 and O3:**
- Molar mass of O2 = 32 g/mol (16 g/mol per oxygen atom)
- Molar mass of O3 = 48 g/mol (16 g/mol per oxygen atom)
**Step 2: Calculate the ratio of effusion rates:**
- Let the effusion rate of O2 be R2 and the effusion rate of O3 be R3.
- According to Graham's law, R2/R3 = sqrt(M3/M2), where M2 and M3 are the molar masses of O2 and O3, respectively.
- Substituting the values, we get R2/R3 = sqrt(48/32) = sqrt(3/2).
**Step 3: Calculate the time ratio:**
- The time ratio of effusion is given as T2/T3 = R2/R3.
- Substituting the value of R2/R3, we get T2/T3 = sqrt(3/2).
**Step 4: Calculate the volume ratio:**
- The volume ratio is given as V2/V3 = T3/T2 (since equal volumes are being compared).
- Substituting the value of T2/T3, we get V2/V3 = 1/sqrt(3/2) = sqrt(2/3).
**Step 5: Calculate the molar ratio:**
- The molar ratio is given as n2/n3 = V2/V3, where n2 and n3 are the number of moles of O2 and O3, respectively.
- Substituting the value of V2/V3, we get n2/n3 = sqrt(2/3).
**Step 6: Calculate the volume ratio of oxygen in ozonised oxygen:**
- The volume ratio of oxygen in ozonised oxygen is given as V(O2)/V(O3) = 0.6 (since it contains 60% oxygen by volume).
- The volume ratio of O2/O3 can be calculated as V(O2)/V(O3) = 0.6 / (1 - 0.6) = 0.6 / 0.4 = 1.5.
**Step 7: Calculate the molar ratio of oxygen in ozonised oxygen:**
- The molar ratio of oxygen in ozonised oxygen is given as n(O2)/n(O3) = V(O2)/V(O3).
- Substituting the value of V(O2)/V(O3), we get n(O2)/n(O3) = 1.5.
**Step 8: Calculate the molar mass of ozonised oxygen:**
- Let the molar mass
A given volume of ozonised oxygen (containing 60% oxygen by volume) re...
Let VmL of gas effused.
V/220V/200=√dO2/dmix
⇒dmix=1.6×(1.1)^2=1.936g/L
Let density of ozone is d; In 100 volume ozonised oxygen, 60%O2 and 40% by volume O3 is present.
∴ Mass of mixture=mass of ozone + mass of oxygen
100×1.936=40×d+60×1.6
Density of O3(d)=2.44g/L.