University:
School of Pharmacy and Pharmaceutical Sciences
Course:
PHARM 270 | Applied Pharmacology
Academic year:

2023
Views:

443

Pages:

2
Author:

Orimiapemia2a0xh

Kinetic Molecular Theory Model Using: Physics Education Technology Interactive Simulations Procedures: Go to PHET 1. Under “Gas Properties” open Ideal. 2. Set the ‘Hold Constant’ to NONE. 3. Use the pump to put a little gas into the box. a. Describe how the particles in the box move. b. Use the heat control box to increase the temperature in the box of gas. What happens to the particles when you add heat? c. What happens when you remove heat? d. Try to make the particles stand still. Why do you find it difficult? e. What is the relationship between the motion of the molecule and their temperature? 4. Reset the simulation. Now pump in some blue (heavier) particles, and add some red (lighter) particles by clicking on the “light species” button. Describe the similarities and differences that you see between heavy and light particles. 5. a) Reset the simulation. Pump in some heavy molecules. Watch the pressure gauge. Can you see a link with the number of collisions per second between the wall of the container and the molecules? b) Increase the temperature. Does the frequency of collisions with the walls increases or decreases? c) State the relationship between the pressure and temperature of the gas. d) Explain this relationship by describing what happens to the molecules and the collisions they make with the container. 6. a) Reset the simulation. This time select ‘PRESSURE’ as the constant parameter. Pump in some molecules. How does the system change to keep the pressure constant? b) Reset the simulation. Firstly select ‘Volume’ as the constant parameter. Pump in some molecules. Allow the molecules to become evenly distributed then select ‘Pressure’ as the constant parameter. Add some heat to the system. How does the system change to keep the pressure constant now? c) State the relationship between Volume and Temperature for a gas at constant Pressure. d) Explain this relationship in terms of the frequency of collisions of the molecules with the wall of the container 7. Reset the simulation. Set the constant parameter to ‘Temperature’ and introduce some molecules to the system. Give the system a moment or two to stabilize. Now pull out the walls of the container. a) What happens to the pressure of the gas? b) Explain this relationship in terms of the frequency of collisions of the molecules with the wall of the container. c) State the relationship between Volume and Pressure for a gas at constant Temperature. 8. Reset the simulation. Set the constant parameter to ‘None’ and introduce some molecules to the system. Give the system a moment or two to stabilize. Now get the person to push in the walls of the container. a) What happens to the temperature and pressure of the gas? b) How can you account for the increase in the internal energy of the gas?

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