Question 21 : The pressure of a compound at 200 K is 10 mm Hg and at 400 K it is 50 mm Hg, what is the pressure at T = 250 K?
1. 18.1 mm Hg
2. 24.2 mm Hg
3. 36.3 mm Hg
4. 48.4 mm Hg
View Answer   Discuss with Members

Question 22 : 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?
1. 1 mm Hg
2. 2 mm Hg
3. 3 mm Hg
4. 4 mm Hg
View Answer   Discuss with Members

Question 23 : For CaOCl₂, the rate of evaporation is given by W = 325p^0.5M/T^1.5 g/liter, where T is in K, p in mm Hg, and M is molecular weight, if its pressure is given by ln p* = 25 - 2700/T, what is the evaporation rate at T = 150 K?
1. 256 g/liter
2. 499 g/liter
3. 571 g/liter
4. 744 g/liter
View Answer   Discuss with Members

Question 24 : The vapor pressure of a compound in a liquid phase is given by ln p* = 21 - 2800/T, and in solid phase it is given by ln p* = 28 - 3500/T, what is the sublimation temperature of the compound?
1. 100 K
2. 120 K
3. 150 K
4. 200 K
View Answer   Discuss with Members

Question 25 : The vapor pressure of liquid benzene is given by ln p* = 15 - 1280/T, and that of vapor benzene is given by ln p* = 23 - 2560/T, what is the boiling point of benzene?
1. 160 K
2. 200 K
3. 240 K
4. 300 K
View Answer   Discuss with Members

Question 26 : At triple point, vapor pressure of ice is given by ln p* = 18 - 2560/T, and vapor pressure of water is given by ln p* = 28 - 5120/T, what is the temperature at triple point?
1. 225 K
2. 256 K
3. 320 K
4. 400 K
View Answer   Discuss with Members

Question 27 : A liquid evaporates first at which of the following conditions?
1. High attraction forces
2. Low attraction forces
3. Low vapor pressure
4. High boiling point
View Answer   Discuss with Members

Question 28 : At which of the following values of pressure a solid melts first?
1. 5 atm
2. 720 mm Hg
3. 500 KPa
4. 40 Torr
View Answer   Discuss with Members

Question 29 : Temperature of SO₂ at 5 Pa is 395 K and at 10 Pa temperature is 420 K, what is the temperature at 6 Pa?
1. 400 K
2. 405 K
3. 410 K
4. 415 K
View Answer   Discuss with Members

Question 30 : What is the pressure of CO₂ at 325 K, if it is given that pressure at 330 K is 6 Pa, and pressure at 320 K is 4 Pa?
1. 4.5 Pa
2. 5 Pa
3. 5.5 Pa
4. 6 Pa
View Answer   Discuss with Members