LABORATORY ACTIVITY
Background:
Air inside of an inflated balloon consists of individual gas molecules that are in constant motion. These molecules constantly collide with each other as well as with the walls of the balloon and these collisions are what we know as pressure. When the air in the balloon is heated, the gas molecules receive more energy and therefore start to move faster and start hitting the walls of the container with greater force. The result of this greater force is that the volume of the balloon expands. From this example we can see that volume, pressure, and temperature of a gas all have an effect on each other in a given system. Likewise, if we were to pump some more air molecules inside the balloon that would increase the number of collisions with the wall of the balloon, creating more pressure and that would cause the balloon to expand. Today we will directly see the relationship between different measurements of gas and use our data that we collect to graphically show this relationship. Purpose: To identify how pressure, volume, temperature, and the amount of gas are all related to each other and to show how we can graphically represent this relationship.
Procedure:
Go to the address below on the internet. http://ch301.cm.utexas.edu/simulations/js/idealgaslaw/
The screen will show a simulation of a sample of gas in a cylinder. Click on the picture at the center of the screen to get started.
To measure the relationship between temperature and volume of a gas (Charles’s Law), this means you will not be varying the pressure in this experiment. Pressure should read the same in all trials. Vary the temperature five different times and read the resulting volume. Enter the data into an appropriate data table.
To measure the relationship between pressure and volume of a gas (Boyle’s Law), this means you will not be varying the temperature in this experiment. Temperature should read the same in all trials. Vary the volume five different times and read the resulting pressure. Enter the data into an appropriate data table.
To measure the relationship between temperature and pressure of a gas (Gay-Lussac’s Law), this means you will not be varying the volume in this experiment. Volume should read the same in all trials. Vary the temperature five different times and read the resulting pressure. Enter the data into an appropriate data table.
Use Excel to generate graphs for each set of data. Remember to plot the independent and dependent variables on the correct axis, and to include all labels on your graph.
Questions
Using the data from the lab explain the relationship between temperature and volume; pressure and volume; and temperature and pressure. Also explain why this happens, making sure you reference information from KMT.
1.Give a real-world example on where you can see all the above relationships take place in everyday life. Explain how your example fits the relationship shown in the experiments.
2.Explain why it is dangerous to heat sealed containers.
3.If you had a balloon at set pressure and set temperature. What would happen to the balloon if more air were added to it? This is called Avogadro’s law. Explain how this works.
Background:
Air inside of an inflated balloon consists of individual gas molecules that are in constant motion. These molecules constantly collide with each other as well as with the walls of the balloon and these collisions are what we know as pressure. When the air in the balloon is heated, the gas molecules receive more energy and therefore start to move faster and start hitting the walls of the container with greater force. The result of this greater force is that the volume of the balloon expands. From this example we can see that volume, pressure, and temperature of a gas all have an effect on each other in a given system. Likewise, if we were to pump some more air molecules inside the balloon that would increase the number of collisions with the wall of the balloon, creating more pressure and that would cause the balloon to expand. Today we will directly see the relationship between different measurements of gas and use our data that we collect to graphically show this relationship. Purpose: To identify how pressure, volume, temperature, and the amount of gas are all related to each other and to show how we can graphically represent this relationship.
Procedure:
Go to the address below on the internet. http://ch301.cm.utexas.edu/simulations/js/idealgaslaw/
The screen will show a simulation of a sample of gas in a cylinder. Click on the picture at the center of the screen to get started.
To measure the relationship between temperature and volume of a gas (Charles’s Law), this means you will not be varying the pressure in this experiment. Pressure should read the same in all trials. Vary the temperature five different times and read the resulting volume. Enter the data into an appropriate data table.
To measure the relationship between pressure and volume of a gas (Boyle’s Law), this means you will not be varying the temperature in this experiment. Temperature should read the same in all trials. Vary the volume five different times and read the resulting pressure. Enter the data into an appropriate data table.
To measure the relationship between temperature and pressure of a gas (Gay-Lussac’s Law), this means you will not be varying the volume in this experiment. Volume should read the same in all trials. Vary the temperature five different times and read the resulting pressure. Enter the data into an appropriate data table.
Use Excel to generate graphs for each set of data. Remember to plot the independent and dependent variables on the correct axis, and to include all labels on your graph.
Questions
Using the data from the lab explain the relationship between temperature and volume; pressure and volume; and temperature and pressure. Also explain why this happens, making sure you reference information from KMT.
1.Give a real-world example on where you can see all the above relationships take place in everyday life. Explain how your example fits the relationship shown in the experiments.
2.Explain why it is dangerous to heat sealed containers.
3.If you had a balloon at set pressure and set temperature. What would happen to the balloon if more air were added to it? This is called Avogadro’s law. Explain how this works.
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Answer:
The Story of Creation (B’laan)27JUN1 In the very beginning there lived a being so large that he cannot be compared with any known thing. His name was Melu, and when he sat on the clouds, which were his home, he occupied all the space above. His teeth were pure gold, and because he was very cleanly and continually rubbed himself with his hands, his skin became pure white. The dead skin which he rubbed off his body was placed on one side in a pile, and by and by this pile became so large that he was annoyed and set himself to consider what he could do with it.
2 Finally Melu decided to make the earth; so he worked very hard in putting the dead skin into shape, and when it was finished he was so pleased with it that he determined to make two beings like himself, though smaller, to live on it.
3 Taking the remnants of the material left after making the earth he fashioned two men, but just as they were all finished except their noses, Tau Tana from below the earth appeared and wanted to help him.
4 Melu did not wish any assistance, and a great argument ensued.
Explanation:
kayorama nano ha