Question
If a 50.0 ml sample of xenon gas is at 0.921 atm and 27 degree C, what is the volume of the gas at STP? 41.0 ml 49.4 mL 50.6 ml 54.9 mL 59.7 mL Section: 10.7 Combined Gas Law If the temperature of a liquid increases, what happens to its vapor pressure? Increases decreases remains constant unpredictable none of the above Section: 10.8 The Vapor Pressure Concept If oxygen gas is collected over water at 25 degree C and 775 torr, what is the partial pressure of the O_2? The vapor pressure of water at 25 degree C is 23.8 torr. 23.8 torr 750 torr 751 torr 775 torr 799 torr Section: 10.0 Dalton's Law of Partial Pressures What are the conditions for a real gas to behave most like an ideal gas? high temperature. high pressure high temperature, low pressure low temperature, high pressure low temperature, low pressure none of the above Section: 10.10 Ideal Gas Behavior What is the term for the resistance of a liquid to spread and its tendency to form spherical droplets? dipole attraction dispersion forces surface tension viscosity none of the above
Explanation / Answer
13) P1V1/T1 = P2V2/T2
(50*0.921/300.15) = (1*V2/273.15)
V2 = FINAL VOLUME = 41.9 ML
answer: 41.9 ml
14) A increases
15) partial pressure of O2 = 775-23.8 = 751.2 torr
answer; C)751 torr
16) B
17) c