17 Aug The goal of this lab to gather data and graph the relationship between Pressure and Temperature.
The website we will be using is Pivot. The website is listed here: https://www.pivotinteractives.com/ (Links to an external site.)
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Lab 11, Intro Description:
The goal of this lab to gather data and graph the relationship between Pressure and Temperature. As the simulation video shows, when the water starts heating up, you can collect as many data points as need to create your table/graph. Make sure to use Pascals and Kelvin as your units here. You can get your data by pausing the video at random intervals to see the temperature and pressure. As you make your graph, you should find that a direct relationship is created. Make sure to put your equation on the graph as well by choosing the best curve fit for your data points (should be obvious from your graph). The last 2 questions ask you to make predictions based on your equation from the data. You can use your graph, although that may be tough with the data points.
Lab 12, Intro Description:
Last lab for the course! This lab will investigate the relationship between the energy of a substance and the temperature that the substance is in. For us, the substance will be liquid water and the energy will come from a lightbulb inside the glass to heat up the liquid. At the start of the video simulation, you will have a chance to measure how much water there is in the container. We will be measuring energy, but the lightbulb is given as a “watt” (which is a form of power). How can we get energy (joules) out of this?
Hint: Watts is a measure of energy/time. In order to get energy, you must know the wattage and the time.
The table and graph will ask you to gather enough data to create a plot for energy and temperature. You are not graphing temperature vs time. One of the most commons mistakes is that students measure the time it takes for a temperature to be present, but loose sight of what the question is asking: a graph of energy vs temperature. Temperature is easy to read – you can get that directly from the video. What about the energy? How can you measure the energy from the tools given here?
Hint: In a previous question, you found the energy when given a time value. Use that method here!
Use standard units of joules for this part of the lab (not a requirement, but might make future questions easier). As you graph your data, you should end up with a straight line. That means that the energy put into the water is directly proportional to the temperature that comes out. The slope will be an important feature of this experiment. One of the questions will ask about the slope and what it takes to make this slope into a specific heat. Think critically here. What are we trying to do? The goal is to make a specific heat out of the slope value. How can we do that?
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