Question

the Lab 9 Pre-Lab Tutorial on the c ase for CHM 10 more detailed explanation of the concepts in pre-lah guests the two -collection apparatuses pictured below. In each case, is the herper part of the invented collection tube and water is the lower part of the keeping the scaled inside the tube. Identity which apparatus pictured below shows trapped a sample with pre eater than atmospheric pressure and which shows a trapped as sample with a sure less than atmospheric pressure. Then briefly explain how and why you can tell whether the pressure of the trapped gas is greater than or less than atmospheric pre b. Given that atmospheric pressure is 755.3 mm He calculate the total gas pressure inside the tube pictured at right, with the water level inside the tube 15.3 cm above the surrounding water. 15.3 cm c. Given that atmospheric pressure is 755.3 mm Hg, calculate the total gas pressure inside the tube pictured at right, with the water level inside the tube 7.5 cm below the surrounding water PRESSURE (atm) TEMPERATURE (0) 99.2 1.05 76.1 Pre-lab extra You can save yourself some time in lab by graphing these P vs. T data in Excel before lab. Follow the directions in Part 2. steps 10-11 of the procedure. Bring the Excel file to lab and you will be able to insert your own data and finish the graph in a couple minutes. 60.3 40.9 22.5 0.991 0.951 0.896 0.845 0.771 210 - Lab 9

Answer 1

Pressure outside the tube & pressure Inside the two outside the rube, the only pressure exected downwards is Poto In figure b. - node the tube the pressure exered downwards 7s Poast Pressure caused by water height higher in tube than outs' de the beaker. - so in b', logas Pan - Pro so the trapped the trapped gas sample has pressure less than atmospheric pressure b Pressure of gas Sample less than ahmospheric pressure now in the height of water level outside the tube is higher than inside GL tube Reg pressure outside a pressure inside Parm + Pro a Pgos. so the happed gas pressure is greater than atmosphenc pressure due to move height of water outside hobe. c - Pressure of gas sample greater than Palm 1cm the ? 0-73559 mm Hg - 1 mm Hg 2 1.35951cm ne. a Pgas ? Palm - PHO . 7 755-3 mmHg - (15.3.cm 140 x 0-13339mmning LOMHO 2 744 0 mmHg Igas a Palm & PHO 2 755-3 mmHg +(75cm X 0.73559 mong 760.8 mm ty for graph pressure Convert values TC on to T (ank) y-axis and Te 99.2°C + 2731 Take Tank) values on x-ax), draupor