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# boyleslaw - Boyles Law: Pressure-Volume Relationship in...

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Boyle’s Law: Pressure-Volume Relationship in Gases The primary objective of this experiment is to determine the relationship between the pressure and volume of a confined gas. The gas we use will be air, and it will be confined in a syringe connected to a pressure sensor (see Figure 1). When the volume of the syringe is changed by moving the piston, a change occurs in the pressure exerted by the confined gas. This pressure change will be monitored using a pressure sensor connected to a LabPro. It is assumed that temperature will be constant throughout the experiment. Pressure and volume data pairs will be collected during this experiment and then analyzed. From the data and graph, you should be able to determine what kind of mathematical relationship exists between the pressure and volume of the confined gas. Historically, this relationship was first established by Robert Boyle in 1662 and has since been known as Boyle’s law. MATERIALS LabPro System Vernier adapter cable TI Graphing Calculator 20-mL gas syringe Vernier Pressure Sensor TI-Graph Link PROCEDURE 1. Prepare the Pressure Sensor and an air sample for data collection. Plug the pressure sensor into the adapter cable in Channel 1 of the LabPro. Move the piston of the syringe until the front edge of the inside black ring is positioned at the 10.0 mL mark. Connect the syringe to the gas pressure sensor as shown in Figure 1. 2. Turn on the calculator. Select DATAMATE from APPS. Select SETUP. Select PRESSURE SENSOR in Ch 1. Select PRESSURE (kPa) 3. Set up the calculator for data collection. Select MODE. Press ENTER Select EVENTS WITH ENTRY from SELECT MODE menu. Press OK. 4. Collect the pressure versus volume data. It is best for one person to take care of the gas syringe and for another to operate the calculator. Move the piston to position the front edge of the inside black ring (see Figure 3) at the 5.0-mL line on the syringe. Hold the piston firmly in this position until the pressure value stabilizes. Press START. When the pressure reading has stabilized, press ENTER on the LabPro. Building Science and Mathematics Connections with Technology with Technology Valparaiso University 1

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Boyle’s Law: Pressure-Volume Relationship in Gases Type in the gas volume (in mL) on the calculator. Press the ENTER key to store this pressure-volume data pair. Repeat this procedure for volumes of 7.5, 10.0, 12.5, 15.0, 17.5, and 20.0 mL. Press STO upon completion. 5. Press ENTER to return to the main menu. Select GRAPH from the MAIN menu when you have finished collecting data. As you move the cursor right or left, the volume (X) and pressure (Y) values of each data point
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## This note was uploaded on 03/06/2011 for the course CHEM 222 taught by Professor Hhfgh during the Spring '11 term at Chapman University .

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boyleslaw - Boyles Law: Pressure-Volume Relationship in...

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