Calorimetry PDF

Preview

Summary

Calorimetry and how to utilize its components ...

Description

Calorimetry We'll be using a different virtual lab today - ChemCollective. Click on the link to go to the calorimetry lab: http://chemcollective.org/chem/thermo/hw2/hw2p4.php. Some hints for the lab: 1. Once an object is on your lab bench, you can: a. Drag it to another object to pour b. Right click to remove it, empty it or to duplicate it c. Right click and select "Thermal Properties to change temperature 2. You can see the concentration of a solution in a container by clicking on it and looking at the left side "Information" box. 3. You can make a beaker an isolated system in the "Thermal properties" from the rightclick menu. If you don't do this, the temperature will change once the components are mixed and then start to cool off immediately. It's easier to tell what the final temperature of the system is in an isolated container. 4. When you need to dilute the solutions, you can do it in a separate beaker, flask, etc., and add distilled water (from the Stockroom). 5. Once you make a new solution, you can right-click and Rename the object, so you know what it is. This is helpful so you can keep track of which beaker(s) are isolated systems. 6. The equation relating the enthalpy of reaction to the heat absorbed by the water is ΔH*n = -(msΔT). The n is the moles of the reactant and the msΔT is for the solute (water in this case). Complete the lab assignment and upload a screenshot to Moodle once you have gotten all of the answers correct. (Use the Print Screen key on Windows or Shift+Command+4 on Mac to take a screenshot.) You can paste the screenshot into a document to upload it to Moodle....