6.50. A correlation for methane solubility in seawater"3 is given by the equation In ß = -67.1962 + 99.1624 T T +27.9015 In| 100 T +s-0.072909 + 0.041674( 100 0.0064603 100 where ß is volume of gas in mL at STP per unit volume (mL) of water when the partial pressure of methane is 760 mm Hg, T is temperature in Kelvin, and S is salinity in parts per thousand (ppt) by weight. At conditions of interest, the average salinity is 35 ppt, the temperature is 42°F, and the average density of seawater is 1.027 g/cm. 12R. H. Perry and D. W. Green, Eds., Perry's Chemical Engineers' Handbook, 8th Edition, McGraw-Hill, New York, 2008, Pp. 2-91, 2-92, and 2-104. 13S. Yamamoto, J. B. Alcauskas, and T. E. Crozier, J. Chem. Eng. Data, 21, 78(1976). hase Systems (a) Estimate the mole fraction of methane in seawater for equilibrium at the given conditions. Use a mean molecular weight of 18.4 g/mol for seawater. What is the Henry's law constant at this temperature and salinity? (b) What does the above equation say about the effect of S on methane solubility? (e) Use the Henry's law constant from Part (a) to estimate methane solubility at the given temperature and salinity, but 5000 ft below the ocean surface. (Hint: Estimate the pressure at that depth.) Exploratory Exercise-Research and Discover (d) Atthe low temperatures and high pressures associated with the depths described in Part (c), methane can combine with water to form methane hydrates, which may affect both energy availability and the environment. Explain (i) how such behavior would influence the results in Part (c) and (ii) how dissolution of methane in seawater might affect energy availability and the environment.

You must base your solutions for this problem on vapor pressure correlations in the form of Antoine's Equation In psat 1 mm Hg with the following parameter values: Compound i benzene toluene Ethylbenzene n-propylbenzene n-butylbenzene A₁ 15.9008 16.0137 16.0195 16.0062 16.0793 B₁ A₁ T+ Cu T+C₁ B₁ 2788.51 3096.52 3279.47 3433.84 3633.40 G₁ -52.36 -53.67 -59.95 -66.01 -71.77 T is in Kelvin and Pat is in mm Hg. Note that more data is given than needed to solve the problem. (As is often the case when looking up data...) a) Calculate and plot the Txy phase diagram for vapor-liquid equilibria of binary mixtures of benzene (light) and ethylbenzene (heavy) at atmospheric pressure. Assume validity of Raoult's law. b) Use your results from part a) to plot the xy equilibrium curve for vapor-liquid equilibria of binary mixtures of benzene and ethylbenzene at atmospheric pressure. Remember that the plots are to use mole fraction of the lighter component as their axes. Banzane *

A large tank filled with a mixture of methane and air at 102 kPa and 25 ⁰C is connected to another large tank filled with a different composition of methane and air also at 102 kPa and 25 ⁰C. The connection between the tanks is a tube with an inner diameter of 50 mm and length of 150 mm. The concentration of methane in one tank is 90 mole percent and in the other, 5 mole percent. DETERMINE: molar density of methane (kmol/m³)? CHOICES: 0.4875 4.1695 0.4010 0.04115

QUESTION 16 Calculate the freezing point. in degrees Celsius, of a solution containing 58.5 grams of CHCI3 (molar mass-119.38 g/mol) and 644.4 grams of eucalyptol C10H180 (molar mass-154.24 g/mol), a fragrant substance found in the leaves of eucalyptus trees. The molal-freezing point depression constant for C10H180 is 4.68°C/m and pure C10H180 freezes at -63.5°Cc. Express your answer to ene decimal place.