Can you help me understand this Chemistry question?
Beyond Labz Heat of Reaction: MgO (s) + HCl (aq)
In this simulation you will use coffee cup calorimetry to measure the heat transfer that occurs when magnesium oxide reacts with hydrochloric acid. You will use your results to calculate the enthalpy of the reaction (
Δ
Hrxn) and compare it to a predicted value calculated using values for standard enthalpy of formation.
As a basis for understanding this lab you should read Chapter 5, section 5-6. You can also refer to Module 5 section on Calorimetry: Measuring Enthalpy Changes and Internal Energy Changes
Beyond Labz Instructions
Download the Beyond Labz worksheet for Heat of Reaction. Print this worksheet so that you can follow the directions on what to do, fill it in and submit it. (Please use this worksheet from Canvas as it contains several modifications of the worksheet supplied by Beyond Labz)
Now launch the Beyond Labz software, and open the Chemistry Lab.
To launch the simulation look at the list of worksheets on the bottom left of the window. Click “Thermodynamics” and then select “Heat of Reaction: MgO + HCl”. The lab will then open.
Follow the instructions in the worksheet. It is a good idea to read through the entire worksheet first before you begin so that you are aware of what is expected. Also check the notes on worksheet and calculations below.
As you progress through the simulation, fill in data and observations on the worksheet in blue or black ink. No pencil! Even though this is a virtual lab this is good lab practice and also important to make sure your submitted work will be clear enough to grade.
To help you get started you can watch a short prelab demo of Beyond Labz that I made as a narrated powerpoint presentation or video
Notes on worksheet and calculations
- Please watch this narrated powerpoint presentation for an example of how to calculate the heat of reaction (for a different reaction)
- Show your work for calculations for full credit.
- Remember to pay careful attention to the sign of calculations. Remember qrxn + qsolution = 0 and you calculate qrxn based on measuring what happens to the solution (qsolution).
- Remember that for a coffee cup calorimeter you are measuring qp, the heat transfer at constant pressure, where
Δ
H =qp
- For step 10, refer to Chapter 5 section 5-7 for guidance with calculating heats of reaction using standard enthalpy values. You can also review Module 5 Measuring Enthalpy Change: Enthalpy of Formation
Preparing and submitting your work
After you complete the worksheet, take a picture of each completed page or scan them. Make sure the quality is good enough to view clearly. If I cannot read it, I will not grade it.
It is best to submit as a PDF or .jpeg (jpg) file. You can submit one file for each page or combine them into one file.
It is best if you submit one file for each simulation.
Check out free PDF Converter (Links to an external site.) and free PDF Merge (Links to an external site.) tools to convert photos to PDF and combine multiple PDF into one file. SmallPDF (Links to an external site.) also has other free tools for working with PDF files.
Please name your file for submission using the convention “Lastname_FirstInitial_HeatReaction” replacing “Lastname” and “FirstInitial” with your own lastname and first initial (for example: Dutnall_R_HeatReaction.pdf).
When you are ready, click the “Submit Assignment” button at the top of this page and use the options available to upload your file(s). Remember to click “Submit”. The due date is October 4th at 11:59 pm.
If you need help, or have not submitted an assignment in Canvas before, check out this assignments help video.
