Part 3: Design a Cold Pack Using the data from the class Blackboard site and the

Question

Part 3: Design a Cold Pack Using the data from the class Blackboard site and the following information, you must design an instant cold pack that will easily fit into a portable first aid kit. Instalce, Inc. (manufacturer) has the following specification for the design: The pack will consist of 2 bags: one containing water and the other containing one of the above salts. The bag containing the water will be placed in the bag containing the salt. When the cold pack is twisted, the bag of water will rupture and mix with the chosen salt. The bag of water will contain 60.00 mL of deionized water. To be affective, the temperature ofthe cold pack must drop 2 oConce the salt and water mixes. Instalce, Inc. wants to spend as little as possible to produce the cold pack.

Explanation / Answer

Dear Student,

1.           For 500gm need $49.10

therefore, for    1 gm ammoniuma salt need =49.10*1/500 =

salt cost per 500gram cost per gram ammonium chloride $49.10 49.10/500=$0.0982 ammonium nitrate $58.40 58.40/500=$0.1168 magnesium sulfate anhydrous $70.00 $70.00/500=$0.14 magnesium sulfate heptahydrat $81.90 $81.90/500=$0.1638 Sodium chloriide $37.00 $37.00/500=$0.074

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