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Pre Lab   Pressure And Volume Relationships
Pre Lab   Pressure And Volume Relationships
Pre Lab   Pressure And Volume Relationships
Pre Lab   Pressure And Volume Relationships
Pre Lab   Pressure And Volume Relationships
Pre Lab   Pressure And Volume Relationships
Pre Lab   Pressure And Volume Relationships
Pre Lab   Pressure And Volume Relationships
Pre Lab   Pressure And Volume Relationships
Pre Lab   Pressure And Volume Relationships
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Pre Lab Pressure And Volume Relationships

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  • 1. Lab: Pressure and Volume Relationships of Gases
  • 2. Lab: Pressure and Volume Relationships of Gases <ul><li>The volume of any sample of gas will decrease when you increase its confining pressure. </li></ul><ul><li>The volume of any sample of gas will increase when you decrease its confining pressure </li></ul><ul><li>By how much? </li></ul>
  • 3. Lab: Pressure and Volume Relationships of Gases <ul><li>Objectives: </li></ul><ul><ul><li>to experimentally determine the relationship between the confining pressure on a sample of gas (small volume of atmospheric air) and its volume. </li></ul></ul><ul><ul><li>construct and interpret a graph of experimental data. </li></ul></ul>
  • 4. Lab: Pressure and Volume Relationships of Gases <ul><li>Safety: </li></ul><ul><ul><li>No goggles or aprons. </li></ul></ul>
  • 5. Lab: Pressure and Volume Relationships of Gases <ul><li>Assignment: </li></ul><ul><ul><li>Work in large lab groups of 3-4 students. Lab groups may not be larger than 4 students. </li></ul></ul><ul><ul><li>Cooperatively read and follow the procedure and collect pressure and volume data. </li></ul></ul><ul><ul><li>1 lab paper and 1 graph will be required per student. </li></ul></ul>
  • 6. Lab: Pressure and Volume Relationships of Gases <ul><li>Do not max out the pressure gauges. </li></ul><ul><li>Example Pressure Gauge </li></ul>
  • 7. Lab: Pressure and Volume Relationships of Gases <ul><li>There are two scales with two units of gas pressure indicated on these gauges. </li></ul><ul><li>Outer numbers represent pressure in units of millimeters of mercury (mmHg) in black. </li></ul><ul><li>Inner numbers indicate units of pressure in units of kilopascals (kPa) in red. </li></ul><ul><li>Example Pressure Gauge </li></ul>
  • 8. Lab: Pressure and Volume Relationships of Gases <ul><li>Syringes can contain volumes of liquids or gases ranging from 0 to 20 cubic centimeters (CC). </li></ul>
  • 9. Lab: Pressure and Volume Relationships of Gases <ul><li>This syringe is in the open position. </li></ul><ul><li>Estimate the volume contained within the syringe from the top of the inner piece. </li></ul>
  • 10. Lab: Pressure and Volume Relationships of Gases <ul><li>A syringe in the open position will be attached to a pressure gauge. </li></ul><ul><li>Do not over tighten the plastic connections. </li></ul><ul><li>Push and firmly hold the syringe into the tubing connected to the pressure gauge as you take pressure and volume readings. </li></ul>

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