CHEM120 Week 4 Virtual Lab: Ideal Gas Law Part I and Part II

• CHEM120 Week 4 Virtual Lab: Ideal Gas Law Part I and Part II • Explain the physical concepts of temperature and absolute zero • Define the relationship between pressure, volume and tempe rature in gases using gas thermometry • Apply the Ideal Gas Law Introduction Just because Celsius, Fahrenheit and Kelvin defined their own temperature scales and named them after themselves, it doesn’t mean that you can’t create your own! In the Ideal Gas Law simulation, you will define the physical concept of temperature and absolute zero. You will observe how ideal gas molecules behave according to the Ideal Gas Law, and you’ll learn about the relationship between pressure, volume and temperature in gases using gas thermometry. Define your temperature scale Your first mission in the Ideal Gas Law simulation will be to define a unique temperature scale. In order to complete this task, you will assign the correct temperature to various reference points. You will discover at which temperature water freezes and nitrogen boils. At the end of this mission, you will be able to calculate a new value for the Boltzmann’s constant. Formulate the Ideal Gas Law Imagine how easy it would be to understand the behavior of an ideal gas if the gas molecules were so big that they could be seen with the naked eye. Well, in this simulation they can! The gas molecules are magnified, so you can see what is otherwise invisible. Your next mission is to define the relationship between the pressure, temperature and volume of an ideal gas sealed in a glass jar. Experiment with gas thermometry Handling extreme temperatures is not a hazard as long as you’re a part of this simulation! Observe the changes in the pressure of an ideal gas as you cool it down from the temperature of boiling water to the temperature of boiling nitrogen. You will have complete freedom to repeat the experiment with any amount of gas and to define the absolute zero temperature. Are you ready to apply the Ideal Gas Law and everything you learned in gas thermometry in order to assist in the transport of an organ for a transplant surgery? Part 1: Complete Labster lab: Ideal Gas Law Part 2: Report and Reflection Purpose: Describe in complete sentences and in your own words, the purpose of this experiment. The Purpose was to show the ideal gas law and how these molecules change according to pressure, volume, and temperature. Observations: Record three observations from the simulation. 1) We transported an organ for donation and had to use another method of finding the temp of the container for the organ. 2) There were 4 ways to change the environment for the gas by adding more gas, increasing the temperature, increase or decrease pressure and releasing gas out the valve. 3) The three reservoirs of boiling nitrogen, boiling water and the ice reservoirs were neat, and I would like to see in person. Answer the questions below: 1. If the pressure of a fixed volume of gas decreased in a sealed container, what variable would you think changed? Did this variable increase or decrease? Following the combined gas law PV=nRT, when pressure decreased the inverse happens to the volume. Volume is the constant and when pressure decrease so does the temperature. 2. Why is it important to convert into units of Kelvin before using the Ideal gas law? Kelvin has to be used because it doesn’t go negative and has to be a positive number for ideal gas equations. 3. Using what you learned in this simulation, explain why compressed gas cylinders, such as those found in the hospital, typically contain a warning to not leave in sunlight or expose to heat. When exposed to heat it’s going to cause increase in pressure within the tank and increase pressure and could cause an explosion. 4. Reflection: Consider what you learned from this simulation. Reflect on three to four key concepts that you learned in this lab exercise. How could the lessons learned in this virtual lab related to a real world situation in the community/world or your future career? Be specific in your answer (this should require 5-10 sentences). I learned about how all gasses have the same absolute zero. Temperatures affect all gasses in a similar way, and the graphs were all similar