Basic Chemical Engineering Practice Test 6

1. What is the humidity if the moles of dry gas is 25 and mole of water vapor are 15?

2. Which of the following is not a way of condensation of vapor?

3. What is the number of components in a system with 3 degrees of freedom and 2 phases?

4. What is the fraction of a gas in a system at partial pressure 1 mm Hg, if the 0.2 fraction of the same gas is at partial pressure 2 mm Hg and 0.3 fraction at partial pressure 3 mm Hg (Use Freundlich Isotherm)?

5. 25 mole of CH₄ reacts completely with excess air, if 25 liter of bone dry air is produced at 27^oC and 5 atm, what is the humidity?

6. Which of the following is called for the curves following isothermal adsorbtion?

7. What is the vapor pressure of ammonia at 305 K, if it is given that the vapor pressure of ammonia at 315 K is 5 mm Hg and at 325 K it is 6 mm Hg?

8. At which of the following values of pressure a solid melts first?

9. What is the total pressure of a system having 50% H₂CO₃ with 6 atm partial pressure and 50% O₂ with 12 atm partial pressure?

10. What is the degrees of freedom of a system with pure water?