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https://phet.colorado.edu/sims/html/gas ... es_en.html
PROCEDURE: Use this computer simulation for gases, URL below: https://phet.colorado.edu/sims/html/gas ... properties en.html Make sure to enable the flash player. 1) Choose the "Ideal" simulator 2) Move the handle all the way to the right to decrease the volume to the max. This volume is approximately 105 L. 3) Pump some particles into the chamber. Allow the particles to spread out evenly and pressure to stabilize as much as possible before recording data. Record data in table below. 4) Reset the simulator. Repeat 2 more times while keeping volume the same and varying the number of particles and temperature. Record your data in Table 1, then calculate R (last column). 5) Move the handle all the way to the left to increase the volume to the max. This volume is approximately 316 L. Repeat steps 3-4 from above for this chamber volume. Record your data in Table 2, then calculate R (last column). 6) Select the "Energy" simulator on the panel at bottom. 7) Pump in some blue particles. Then pump in some red particles. Allow them to spread out evenly in the chamber and pressure to stabilize as much as possible before recording the data. 8) Fill out table below. Use Equation 1 to calculate the average kinetic energy for the particles in the chamber. 9) Use Equation 2 to fill out the last two columns of Table 3 below. DATA TABLES: Table 1: Data for Chamber Volume 105 L Trial Volume (L) mol Temp. (K) Pressure (atm) R (L•atm/K•mol) 1 2 3 Table 2: Data for Chamber Volume 316 L Trial Volume (L) mol Temp. (K) 1 2 3 Table 3: Relationship between Mass and Velocity Particle Temp. (K) Velocity (m/s) blue red Pressure (atm) | R (L•atm/K•mol) KEAVE (J/mol) Mass (kg/mol) Based on the molar mass, identify the blue and red gases: Identity of blue gas: Identity of red gas: Molar Mass (g/mol)
What can you conclude about the relationship between mass and velocity of a gas? Fill in the blank: The the mass of a gas the its velocity. POST LAB QUESTIONS: 1) Calculate the average R values from the 6 trials you performed (from Table 1 & 2). Look up the equation for standard deviation and calculate the standard deviation for your 6 R values. Also calculate the percent error using the equation below: % error = true - experimental true x 100 A % error < 5% is consider good. Reflect on your percent error. 2) Explain in your own words why smaller particles travel at higher speeds than larger particles?