You and your team will need to use your knowledge of chemistry to come up with a
ID: 1061738 • Letter: Y
Question
You and your team will need to use your knowledge of chemistry to come up with a product design which includes full details of the cooling process with exact quantities of any chemicals used and time periods required to give us our desired -5 degree C temperature change. We would like you to provide us with both theoretical and experimental quantities for any chemicals used in order for us to evaluate the effectiveness of your design. In order to pass the strict requirements for Health and Safety imposed by Health Canada, it is also imperative that the cooling process is safe. We at the department have done a little research ourselves and have found two chemicals that we think would be useful: ammonium chloride (NH_4C1); solubility 37.2 g/100 g water, $62.40 per 500 g ammonium nitrate (NH_4NO_3); solubility 192 g/100 g water, $64.62 per 500 g Please include with your final product design an explanation of which chemical you decided most suitable and why, including careful consideration of the Health and Safety implications of your chosen design. We need to know that you have successfully tested your design. Please provide data to indicate this. Finally, if you and your team wish to name the product and design a label for the product, we will take your suggestions into consideration.Explanation / Answer
Ammonium chloride can be the best choice for this design because less amount of salt can be used as
it is highly soluble in water than ammonium nitrate, and for this reason it even makes economically
feasible. As far as safety concerns both of these chemicals have their own disadvantages but comparatively
ammonium chloride has less danger regarding the inflammation where as ammonium nitrate should be
kept away from ignition sources.
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