Average Molecular Mass -- Composition of a Gaseous Mixture Chlorodi fluoromethan

Question

Average Molecular Mass -- Composition of a Gaseous Mixture Chlorodi fluoromethane (CHF_2CI) was widely used in the compression/cooling circuits of refrigeration or air- conditioning systems. Since the discovery that such compounds (HCFCs and CFC's) released into the atmosphere were a major cause of depletion of stratospheric ozone, newer refrigeration systems make use of certain hydrofluorocarbons (HFCs), which are degraded in the lower atmosphere instead. Often, mixtures of such compounds are used. Suppose a sample of refrigerant gas consisting of a simple mixture of the gases pentafluoroethane (C_2HF_5) and 111-trifluoroethane (C_2H_3F_3) has a density of 3.82 g/L at 11 degree C and 0.923 atm. Calculate the average molecular mass for this sample. 9.65 times 10^1 amu Calculate the volume percentage of C_2H_3F_3 in the sample.

Explanation / Answer

First part of the problem, you have already solved.

So, I am solving the second part only.

As per Avogadro theory volume percentage is equal to the mole percentage.

So -
9.65 x 10^1 = {110x + 84[100-x]}/100 [Here, 84 is the molecular weight of C2H3F3]

=> 96.5x100 = 110x + 8400 - 84x

=> 1250 = 26x

=> x = 48.08

Therefore, C2H3F3 mole percentage = C2H3F3 volume percentage = 48.08 %

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.