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Using Henry's Law constants in Table 6.1 of Tinoco, calculate the solubility in M of each gas in water at 298 K if P(O2)= 0.2 bar, P(N2)= 0.75 bar, P(CO2)= 0.05 bar.

Using Henry's Law constants in Table 6.1 of Tinoco, calculate the solubility in M of each gas in water at 298 K if P(O2)= 0.2 bar, P(N2)= 0.75 bar, P(CO2)= 0.05 bar.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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4) In class, we derived the condition for equilibrium between a gas and the same chemical dissolved in solution Peap Poop YAXA (4) where Prap is the equilibrium pressure of the vapor, Pp, is the vapor pressure of the pure substance, 74 is the activity coefficient of A in the solution, and XA is the mole fraction of A in solution. We can define a constant, called the Henry's Law coefficient ka, such that kA = PopYA. Note that ka is a property of both the chemical A (Pp) and solvent (which determines YA). Then Equation 4 can be rewritten as Poop = KAXA (5) 1 Note that Equation 5 is essentially the same as Equation 4, but now it's easier to tabulate one constant, and values of ka can be found in tables such as Table 6.1 of Tinoco. Note that ka has units of bar, since XA is unitless (mole fraction). Using Henry's Law constants in Table 6.1 of Tinoco, calculate the solubility in M of each gas in water at 298 K if P(O2)= 0.2 bar, P(N2)= 0.75 bar, P(CO2)= 0.05 bar.
Transcribed Image Text:4) In class, we derived the condition for equilibrium between a gas and the same chemical dissolved in solution Peap Poop YAXA (4) where Prap is the equilibrium pressure of the vapor, Pp, is the vapor pressure of the pure substance, 74 is the activity coefficient of A in the solution, and XA is the mole fraction of A in solution. We can define a constant, called the Henry's Law coefficient ka, such that kA = PopYA. Note that ka is a property of both the chemical A (Pp) and solvent (which determines YA). Then Equation 4 can be rewritten as Poop = KAXA (5) 1 Note that Equation 5 is essentially the same as Equation 4, but now it's easier to tabulate one constant, and values of ka can be found in tables such as Table 6.1 of Tinoco. Note that ka has units of bar, since XA is unitless (mole fraction). Using Henry's Law constants in Table 6.1 of Tinoco, calculate the solubility in M of each gas in water at 298 K if P(O2)= 0.2 bar, P(N2)= 0.75 bar, P(CO2)= 0.05 bar.
He is the least soluble, and C,H, and CO, are the most soluble. Gas solubility is also a gases, function of temperature and depends on the solvent. Oxygen is about 20% less soluble at 37°C (physiological temperature) than at 25°C. Note that lower numbers mean higher solubility. TABLE 6 Henry's Law coefficients kg = Py.p/xg, in bar, for aqueous solutions Gas O°C 25°C 37°C He 131 x 103 139 X 10 138 X 10 50X 103 84 x 10 98 X 103 CO 35X 10 57 x 103 67x 10 26 X 10 42 x 10 50x 10 0, CH, 23 X 10 38X 10 46 x 10 Ar 24 x 10 38X 10 45 X 10 CO2 0.71 X 10 1.59X 10 2.13 x 10 CH, 0.71 X 10 1.32 X 10 1.69 X-10 Source: Based on data from Harvey, A. H. "Semiempirical correlation for Henry's constants over large temperature ranges." AICHE Journal, 42, pp. 1491 1494. DOL 101002/aic.690420531. Copyright (c) 1966 John Wiley and Sons, Inc. Phase Equilibria205
Transcribed Image Text:He is the least soluble, and C,H, and CO, are the most soluble. Gas solubility is also a gases, function of temperature and depends on the solvent. Oxygen is about 20% less soluble at 37°C (physiological temperature) than at 25°C. Note that lower numbers mean higher solubility. TABLE 6 Henry's Law coefficients kg = Py.p/xg, in bar, for aqueous solutions Gas O°C 25°C 37°C He 131 x 103 139 X 10 138 X 10 50X 103 84 x 10 98 X 103 CO 35X 10 57 x 103 67x 10 26 X 10 42 x 10 50x 10 0, CH, 23 X 10 38X 10 46 x 10 Ar 24 x 10 38X 10 45 X 10 CO2 0.71 X 10 1.59X 10 2.13 x 10 CH, 0.71 X 10 1.32 X 10 1.69 X-10 Source: Based on data from Harvey, A. H. "Semiempirical correlation for Henry's constants over large temperature ranges." AICHE Journal, 42, pp. 1491 1494. DOL 101002/aic.690420531. Copyright (c) 1966 John Wiley and Sons, Inc. Phase Equilibria205
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