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Energy Change in a chemical reaction. Throughout this investigation I will try to figure out the energy difference between different compounds reacting with water in a solution while it is being heated up.

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Introduction

´╗┐Chemistry Lab report Gordon Ho Energy Change in a Chemical Reaction Introduction Throughout this investigation I will try to figure out the energy difference between different compounds reacting with water in a solution while it is being heated up. The experiment that was conducted to find a difference between solutions such as hydrochloric acid and water and compare it a regular water solution to examine the factors of that would produce an energy change between the two solutions. I hypothesize that since magnesium and hydrochloric acid will react heavily and the resulting solution will be of a lower boiling and melting point so therefore it will take longer for the solution to boil. I also hypothesize that the solution with the water and magnesium will accelerate the energy change while heated up as magnesium is a highly reactive metal and will cause a reaction at an increased temperature and cause particles within the solution to speed up and increasing the temperature. ...read more.

Middle

to create a solution and heated it up to 70 degrees Celsius with a Bunsen burner, recorded the temperature with a thermometer every 30 seconds until it reached 70 degrees Celsius. 3. Poured 150 ml of water into a beaker and added magnesium powder (5g) and hydrochloric acid (10ml) and heated it up with a Bunsen burner, recorded the temperature with a thermometer every 30 seconds until it reached 70 degrees Celsius. 4. Recorded the data Data Regular Water Time Temperature (Celsius) 30s 26 1m 33 1m30s 43 2m 52 2m30s 60 3m 70 Hydrochloric acid + magnesium powder + water (solution) Time Temperature (Celsius) 30s 26 1m 31 1m30s 39 2m 45 2m30s 54 3m 66 3m30s 70 Water + magnesium powder (solution) Time Temperature (Celsius) 30s 26 1m 30 1m30s 36 2m 44 2m30s 48 3m 54 3m30s 59 4m 63 4m30s 66 5m 70 The data above shows the different energy levels in each of the solutions while it is heated up to 70 degrees Celsius. ...read more.

Conclusion

Time was also a factor in the reaction between water and magnesium as nothing happened during the reaction and the energy change was minimal and slow due to the temperature cap of 70 degrees. Evaluation The lab experiment was planned accordingly and the lab experiment went smoothly, however some of the results were unreliable and inaccurate, for example the reaction between magnesium and water occurred to slowly due to a temperature cap of 70 degrees which made the reaction between the two elements slower and less visible therefore the results from the test were somewhat unreliable due to limits. Another possible problem with the results could also arise from the accuracy of the results as the precise time was not given and the time was rounded to the nearest 30 seconds which could cause some issues concerning the accuracy of the experiment as results may differ. Overall the experiment could have gone better and the general idea of the experiment has succeeded, but some issues conflict the results. ...read more.

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