advertisement

Chapter 11 Study Guide Answers: 1. Newton 2. Pressure increases. Pressure decreases. 3. There is no pressure inside, and so the pressure on the outside is much greater than the inside pressure 4. Manometer 5. A barometer measures the pressure of the atmosphere pushing down on a column of mercury. One end is open to the atmosphere, and the other end is closed under a vacuum, so there is no opposing pressure. 6. Standard pressure= 1 atm = 760 mm Hg = 101.3 KPa = 101,325 Pa 7. Dalton 8. Pressure 9. Temperature and Pressure 10. Avagadro 11. At constant T and P 12. The relative rate of effusion of two gases is inversely proportional to the square root of the molar masses. 13. V1/T1=V2/T2 V2= 6 L x 285 K/277 K =6.2 L 14. P1/T1=P2/T2 P2=1.45 atm x 298 K/263 K = 1.6 atm 15. P1V1/T1=P2V2/T2 T2= P2V2T1/P1V1 = 0.7 atm x 1000 ml x 302 K/1.5 atm x 375 ml = 375.8 K 375.8 K – 273 = 103 C 16. P1V1/T1=P2V2/T2 V2= P1V1T2/T1P2 = 720 mm Hg x 16 ml x 295 K/282 K x 760 mm Hg = 15.9 ml 17. PV=nRT 1 atm x 1 L/ 0.0821 x 273 K = 0.0446 mole gas 1.75 g/0.0446 moles= 39.2 g/mole 18. 5 L of Cl2, therefore 5 L H2 and 10 L HCl 10 L HCl x 1 mole/22.4 L = 0.4464 mol HCl 0.4464 mol HCl x 36.5 g/mol HCl = 16.29 g HCl 19. PV=nRT n=PV/RT n=1.5 atm x 5 L/0.08 x 293 K= 0.31178 mol 10.8 g/0.31178 mol=34.63 g/mol 20. As altitude increases, atmospheric pressure decreases. Your ears pop when the pressure inside your ears is different than the pressure outside your ears. 21. 1 atm, 0 degrees C or 273 degrees K; to compare data 22. Each gas exerts pressure according to how many molecules; other gases present does not change that 23. He proposed that some gases are diatomic; later experiments proved that he was correct.