Stop & Think Questions: What is the relationship between fluid flow and viscosity? You correctly answered: b. They are inversely proportional to each other. What effect do you think aplastic anemia (reduced red blood cells) would have on blood flow? You correctly answered: a. increased blood flow due to decreased viscosity Experiment Data: Flow (ml/min) 490.6 245.3 163.5 122.7 98.1 81.8 70.1 61.3 Radius (mm) 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 Viscosity 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 Length (mm) 50 50 50 50 50 50 50 50 Pressure (mm Hg) 100 100 100 100 100 100 100 100 02/09/15 page 2 Post-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly.
This means that if the pressure on the gas increases, the volume decreases proportionally; conversely, if the pressure decreses, the volume increases. Doubling the pressure cuts the volume in half; tripling the pressure reduces the volume to one-third its original value; quadrupling the pressure reduces the volume to one-fourth its original value. The mathematical equation for Boyle’s law is P1 x V1 = P2 X V2 Boyle’s law is consistent with kinetic molecular theory. The pressure that a gas exerts results from collisions of the gas molecules with the sides of the container. If the volume of a container holding a specific number of gas is increased, the total wall area of the container will also increase, and the nu Charles’s law p 170 The relationship between the temperature and the volume of a gas at constant pressure is called Charles’s law after the French scientist Jacques Charles.
The NMR spectrum does contain impurities including methanol (4.80 ppm), methyl oleate (5.40 ppm), CHCL3 (7.20 ppm), acetone (2.00 ppm), and water (1.60 ppm). The methyl oleate may be present due to incomplete reaction with hydrogen and the CHCL3 may be present due to the contamination of CDCL3 NMR solvent. Acetone was used as a cleaning agent on the apparatus before starting the experiment. The experimental NMR spectrum does match that of an authentic spectrum except the experimental spectrum contains a greater number of peaks due to
if you were to have a larger hole in your aluminum cap, you would be losing vapor to the room. If this is the case then you would have a falsely high weight of vapor. It seems that you take a known volume of vapor and condensed and weigh it b) Water vapors condensed under the aluminum foil before the final weighing. If Water vapors condensed under the aluminum foil before the final weighing, the final weight would be lower than the fact. There will have some error.
Using the G° data in your Appendix B, calculate the change in Gibbs free energy for each of the following reactions. In each case, indicate whether the reaction is spontaneous under standard conditions. a) H2 (g) + Cl2 (g) → 2HCl (g) b) MgCl2 (s) + H2O (l) → MgO (s) + 2 HCl (g) c) 2 NH3 (g) → N2H4 (g) + H2 (g) d) 2 NOCl (g) → 2 NO (g) + Cl2 (g) 4. From the values given for ΔH° and ΔS°, calculate ΔG° at 25°C for each of the following reactions. If the reaction is not spontaneous under standard conditions at 298K, at what temperature (if any) would the reaction become spontaneous?
As a result of such accurate laboratory determinations most of the heat-capacity ratios have a small percent error. The exception is air, this may be due to the fact that the Kundt’s tube had residue gas from the trial preceding it and there was a mixture of air and another gas. The determined values for the heat-capacity ratio (λ) are as follows: air 1.29±.03, argon 1.659±.01, carbon dioxide 1.28±.01, helium 1.65±.01, nitrogen 1.39±.01 and oxygen 1.39±.01. Experimental Procedure The procedure had been modified as follows: Instead of having a movable piston in the Kundt’s tube, a stationary microphone was at one end of the tube and a stationary speaker at the other end. Frequencies from 300-3400 Hz were sent through the tube by the speaker and the amplitude was recorded by the microphone.
The following mistakes were made when carrying out the experiment. What effect does each have on the calculated molar mass? Be specific. For example, too large because… Only part of the pipet was immersed in the boiling water, so the temperature in part of the pipet was less than that of the water bath. If the temperature was less than the water bath in some places because only part of the pipet was immersed in the boiling water, the molar mass calculated would become lower.
The metal always had a larger change in temperature than the water, no matter whether the metal started hot or cold. This is because the metal has much less mass than the water in each trial. In general, the part of the system with less mass will change temperature more. 2. Of the four trials, transfer to the first row of this column the data for the trial that came closer to the theoretical value: | | | | | | Best Case | 80.0 g | 285.1 g | -75.1 C° | +1.9 C° | 0.377 |
Experiment: Photoelectric Effect Course Name/Section: Physics 222 Section 012 Date: April 12, 2012 Conclusion The slope of the first order stopping potentials was 0.3753 which yielded an h value of 6.0048x10-34Js, which was 9.38% off of the accepted h value of 6.6x10-34Js. The second order stopping potential’s slope was 0.4255. This yielded an h value of 6.808x10-34Js, which was 2.75% off of the accepted h value. There were many sources of error in this experiment. The percent error is much higher for the first order stopping potential than for the second.
At low pressure, the manometer displayed a 100% error, which trailed off smoothly to a final value of 31% at high pressure. The piezometer, on the other hand, simply fluctuated up and down between 0 and 10% error with no relationship to the pressure level. This could be evidence of a small leak in the manometer which causes a fixed pressure drop, causing a greater percent difference at lower pressures than at higher pressures. Introduction and Objective: Pressure is a measure of force exerted per unit area. In order to use the principles of fluid statics to analyze pressure in a system, it is helpful to make several assumptions.