Procedure:

1. Effect of change in Volume on Pressure and Temperature.

Using the gas law apparatus.

(See Figure 5.2 Below)

Temperature Gauge Piston Handle Pressure Gauge Piston Valve Handle1. Open the valve. Valve handle should be parallel to pipe. (See Figure 5.3 Below) LOOS Gas Law Apparatus HO Figure 5.3 - Valve in open position.2. Turn the piston so that the bottom gasket is at the 60 1111 volume mark. (See Figure 5.4 Below) Figure 5.4 Gasket Location. 3- Close the valve. (See Figure 5.5 Below) Figure 5.5 Valve in closed position. 4. Record the initial volume, gauge pressure and temperature in Table 5.7. [Setting 1] 5. Turn piston handle clockwise to decrease the volume to the 40 ml mark. Wait a few seconds for the temperature reading to stabilize. I"'Il'l Record volume, gauge pressure and temperature in Table 5.7. [Setting 2] Table 5.? Setting Volume Gauge Temperature Temperature ML) Pr essur e (K) mIIm mII Note: For Assistance with Calculations see Calculations section below 6. Convert all temperatures to Kelvin. Record in Table 5.7. [c + 273.15 = K] 7. Calculate Expected pressure for Setting 2 [3] by using Setting 1 for the initial conditions. i.e. Initial Volume I V1, Initial Temperature in Kelvin = T1 and Initial Actual Pressure = P1 [Setting 1] and V2 and T2 are from the volume and Kelvin temperatures from Setting 2. Record in Table 5.8. P1V1fT1 = EgVTs 8. Calculate % error for the observed pressure vs the expected pressure. Use the Gauge Pressure for Setting| 2 as the observed and the calculated expected pressure as the expected. Record in Table 5.8. [(O-EME] * 100 = 943 error Condition Expected Pressure (PSI) 1 initial + Table 5.9 Setting Volume Gauge Temperature Temperature ML) Pressure (0 C} (K) (PSI) 1 (initial) [V1] [P1] [T1] 2 2 T2 Note: For Assistance with Calculations see Calculations section below 8. Convert all temperatures to Kelvin. Record in data table 5.9. [c + 273.15 = K] 9. Calculate Expected pressure for Setting 2 [2] by using Setting 1 for the initial conditions. i.e. Initial Volume : V1, Initial Temperature in Kelvin 2 T1 and Initial Actual Pressure 2 P1 [Setting 1] and V2 and T2 are from the volume and Kelvin temperatures from Setting 2. Record in Table 5.10. P1V1J'T1 : 2V21'T2 10. Calculate % error for the observed pressure vs the expected pressure. Use the Gauge Pressure for Setting 2 as the observed and the calculated expected pressure as the expected. Record in Table 5.10. [(0-E)/E] * 100 = % error Table 5.10 Condition Expected % error Pressure (PSI) 1 (initial) NA NA 2 Calculations: I. Converting Celsius to Kelvin: K = C + 273.15 Where C = Measured temperature in Celsius 30Find the Standards +f+ PEL REL TLV Is your sample above the AL? Carbon Monoxide Carbon Dioxide Sulfur Dioxide Ammonia Nitrogen DioxideChlorine