Advertisements
Advertisements
Question
State Henry’s law and explain why are the tanks used by scuba divers filled with air diluted with helium (11.7% helium, 56.2% nitrogen and 32.1% oxygen)?
Advertisements
Solution
Henry’s law: the partial pressure of the gas in vapour phase (p) is proportional to the mole fraction of the gas (x) in the solution.
The pressure underwater is high, so the solubility of gases in blood increases. When the diver comes to surface the pressure decreases so does the solubility causing bubbles of nitrogen in blood, to avoid this situation and maintain the same partial pressure of nitrogen underwater too, the dilution is done.
APPEARS IN
RELATED QUESTIONS
Henry’s law constant for the molality of methane in benzene at 298 K is 4.27 × 105 mm Hg. Calculate the solubility of methane in benzene at 298 K under 760 mm Hg.
Write the name of gas released when Cu is added to dilute HNO3
State Henry’s law.
The statement “If 0.003 moles of a gas are dissolved in 900 g of water under a pressure of 1 atmosphere, 0.006 moles will be dissolved under a pressure of 2 atmospheres”, illustrates.
The value of Henry's constant KH is ______.
Explain the solubility rule “like dissolves like” in terms of intermolecular forces that exist in solutions.
Explain the following phenomena with the help of Henry’s law.
Painful condition known as bends.
Assume that argon exerts a partial pressure of 6 bar. Calculate the solubility of argon gas in water. (Given Henry’s law constant for argon dissolved in water, KH = 40 k bar)
Write the two applications of Henry’s law.
Amongst the following compounds, identify which are insoluble, partially soluble and highly soluble in water?
- phenol
- toluene
- formic acid
- ethylene glycol
- chloroform
- pentanol
