15-2

Standard pressure = 1atm=760 mm Hg = 101.3 kPa Determine the new volume for each of these pressure changes. 1 780mm Hg x 100ml = 760mm Hg x X = 102.63 ml 2. = 243.42 mL 3. =25mL =19.74mL 4. =750x700=800v = 525000=800v/800 =656.25mL 5. =44.79mL Determine the new pressure for each of these volume changes. 6. 130.0 mL at 785 torr to 140.0 mL=728.93torr 7. 65.5 mL at 680.0 torr to 40.0 mL 65.5x680=40v= 44540=40v/40= 1113.5torr 8. 250.0 mL at standard pressure to 225 mL =844.45mmHg 9. 16.8 L at 1.000 atm to 15.0 L =1.12atm 10. 22.4 L at 0.853 atm to 24.0 L= .80atm 11. 125 ml / 298 k = 34125 / 298 = 114.51 ml 12. 310.0 mL at 58 ° C to 15.0 ° C =269.73mL 13. 20.0 mL at 33.0 ° C to 57.0 ° C =273+33=306k. 20x330=6600/306=21.57mL 14. 350.0 mL at -30.0 ° C to standard temperature = 393.21mL 15. 2.0 L at -45.5 ° C to standard temperature = 2.4mL 16. 85.0 mL at 14 ° C to 74.0 mL =249.86 C 17. 39.0 mL at 28 ° C to 30.0 mL =273+28=301kX30=9030/39=231.54 C 18. 100.0 mL at 0.0 ° C to 35 mL = 95.55 C 19. 5.00 mL at 5.0 ° C to 5.5 mL= 305.8 C 20. 10.0 L at 10.0 ° C to 5.00 L= 91.5 21.440 - 373 = X = 67mm Hg 22. Total pressure = 720 mm Hg, Gas 2 = 93 mm Hg, Gas 3 = 330 mm Hg.. gas 1=297 mm Hg 23. Total pressure = 9000 mm Hg, Gas 2 = 89 mm Hg, Gas 3 = 3000 mm Hg gas 1=5911 mm Hg 24. Total pressure = 760 mm Hg, Gas 2 = 4 mm Hg, Gas 3 = 240 mm Hg 240+4=244 760-244=516 mm Hg 25. Total pressure = 435 mm Hg, Gas 2 = 3 mm Hg, Gas 3 = 145 mm Hg =287 mm Hg 26. What pressure will be exerted from 0.50 moles of a gas contained in a 1.00 L flask at 25.0 ° C? 27. Find the molecular mass of a gas if 1.0 L of a gas has a mass of 2.87 g at 15.0 ° C and 745 torr. 28. What volume will be occupied by 1.35 moles of a gas at 100 ° C and 2.58 atm of pressure? 29. Calculate the value of the gas constant using STP, one mole of gas, and the volume for one mole of a gas. 30. What will be the pressure of 0.010 mol of oxygen gas in a 4.5 L flask at a temperature of 1.000 × 104 ° C? **Ideal Gas Law (pt 2)** Determine the missing data. Assume all gases are dry. Staple your work to the back. //Don’t forget to use Kelvin temperatures. ST = Standard Temperature = 273 K. SP = Standard Pressure =1 atm//