Instruction Manual Instructions Experiment No.
Ideal Gas Law Apparatus Model No. TD-8596A Table of Contents Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Equipment Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Experiment 1: Ideal Gas Law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Safety . . . . . . . . . . . . . . . . .
Model No. TD-8596A Ideal Gas Law Apparatus Ideal Gas Law Apparatus Model No. TD-8596A 1 2 4 3 5 Included Equipment Replacement Part Number 1. Mechanical stop 2. Syringe and plunger 3. Thermistor 4. Pressure connector (quick-release connector) 5. Temperature connector (mini stereo jack) 6.
Ideal Gas Law Apparatus Additional Equipment Required or Recommended (*) Model No. TD-8596A Model Number PASPORT interface* Pressure/Temp sensor or Pressure sensor and Temperature sensor (*) PASPORT extension cable PS-2146 or PS-2125 and PS-2107 PS-2500 (*See the PASCO catalog or web site for more information.) Introduction The Ideal Gas Law Syringe allows simultaneous measurements of temperature and pressure of a gas as it is compressed.
Model No. TD-8596A Procedure Experiment 1: Ideal Gas Law Procedure 1. With the pressure coupling disconnected, push the plunger all the way in so that the stop is bottomed out. Record the volume reading on the syringe. It should be around 20 cc. 2. Set the plunger for a volume of 40 cc. Connect the pressure coupling, and make sure the temperature jack is also plugged in. Hold the base of the apparatus firmly against a sturdy horizontal surface. Mechanical Stop Plunger 40 cc 3.
Ideal Gas Law Apparatus Model No. TD-8596A Table 1: Constant Temperature Volume (cc) 1 Pressure (kPa) 40.0 2 3. For constant temperature, the Ideal Gas Law reduces to P1V1 = P2V2, or V1 P ------ = -----2 V2 P1 (1) 4. Take the ratio of the final pressure over the initial pressure P2 / P1. Take the ratio of the initial volume over the final volume V1 / V2. Are they equal? Why not? There is actually a small consistent error in the volume that you can account for.
Model No. TD-8596A Procedure Table 2: Varying Temperature Volume (cc) Pressure (kPa) Temperature (K) 1 2 4. Record the volume (V2), (including Vo) of the fully compressed plunger. 5. The Ideal Gas Law states that the quantity. PV -------- = Constant. T Use your values to calculate the ratio P1 V1 -----------T1 Use your values to calculate the ratio P2 V2 -----------T2 6. Compare these two ratios. Are they about the same? Calculate the percent difference between them.
Ideal Gas Law Apparatus Model No. TD-8596A Safety Read the instructions before using this product. Students should be supervised by their instructors. When using this product, follow the instructions in this manual and all local safety guidelines that apply to you. Technical Support For assistance with any PASCO product, contact PASCO at: Address: Phone: Fax: Web: Email: PASCO scientific 10101 Foothills Blvd. Roseville, CA 95747-7100 (916) 786-3800 (800) 772-8700 (916) 786-3292 www.pasco.
Model No. TD-8596A Teacher’s Notes—Ideal Gas Law Experiment 1: Teacher’s Notes—Ideal Gas Law Constant Temperature, Sample Data and Analysis Table 1: Constant Temperature Volume (cc) Pressure (kPa) 1 40.0 99.76 2 20.0 184.17 P2 V2 – P1 V1 V 0 = ------------------------------P1 – P2 V0 = 3.6 cc Among different lab groups or over several trials you may find that calculated values of V0 vary by 1 cc or more.
Ideal Gas Law Apparatus Model No. TD-8596A Varying Temperature, Sample Data and Analysis Table 2: Varying Temperature Volume (cc) Pressure (kPa) Temperature (K) 1 43.6 99.76 301.04 2 23.6 199.22 321.08 P1 V1 ------------ = 14.4 kPa cc K T1 P2 V2 ------------ = 14.6 kPa cc K T2 Percent Difference = 1% Answers to Questions 1. When the cylinder is compressed, the pressure momentarily spikes because the temperature of the gas increases.
Model No. TD-8596A Teacher’s Notes—Ideal Gas Law Workbook Experiment 1: Teacher’s Notes—Ideal Gas Law Workbook With the electronic workbook contained on the CD-ROM, students will explore the relationship between the volume, pressure and temperature of a gas. They will compare graphs of V versus TP for two different quantities of gas, and use these graphs to calculate the number of moles in both cases.
Ideal Gas Law Apparatus Model No. TD-8596A Answers to Questions on Page 5 of the Workbook: 3. The slope of each line is nR. From the slope and the initial pressure and temperature on Table 1, the initial volume of gas is: Initial Volume = nRTP = (21.3 cc·kPaK) × (300 K) (102 kPa) = 62.8 cc 4. This figure is the volume of the syringe, plus the volume of the attached tubing: Volume of tubing = 62.8 cc - 60.0 cc = 2.8 cc 5. The y-intercept of the best-fit line, 2.
