The equilibrium partial pressure of water vapor in contact with a certain silica gel on which water is adsorbed is, at 25C, as follows: Partial pressure of water, mmHg 0 2.14 4.74 7.13 9.05 10.9 12.6 14.3 16.7 Ib water/ 100 lb dry gel – kg/100 kg 0 5 10 15 20 25 30 35 40 (a) Plot the equilibrium data as P – partial pressure of water vapor against x – wt fraction water in the gel (6) Plot the equilibrium data as X – mol water/mass dry gel, Y = mol water vapor/mol dry air, for a total pressure of 1 std atm. (c) When 10 lb (4.54 kg) of silica gel containing 5 wt% adsorbed water is placed in a flowing airstream containing a partial pressure of water vapor – 12 mmHg, the total pressure is 1 std atm and the temperature 25C. When equilibrium is reached, what mass of additional water will the gel have adsorbed? Air is not adsorbed. (d) One pound mass (0.454 kg) of silica gel containing 5 wt% adsorbed water is placed in a vessel in which there are 400 ft (11.33 m) moist air whose partial pressure of water is 15 mmHg. The total pressure and temperature are kept at 1 std atm and 25C, respectively. At equilibrium, what will be the moisture content of the air and gel and the mass of water adsorbed by the gel? Ans: 0.0605 kg water. (e) Write the equation of the operating line for part (d) in terms of X and Y. Convert this into an equation in terms of p and x, and plot the operating curve on P, x coordinates. (1) If 1 lb (0.454 kg) of silica gel containing 18% adsorbed water is placed in a vessel containing 500 ft (14.16 m?) dry air and the temperature and pressure are maintained at 25C and 1 std atm, respectively, what will be the final equilibrium moisture content of the air and the gel. (8) Repeat part ( for a total pressure of 2 std atm. Note that the equilibrium curve in terms of X and Y previously used is not applicable.
Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.Read more
Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.Read more
Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.Read more
Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.Read more
By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.Read more