6. Single use instant hot packs come in two main varieties; one needed exposure to air...
6. Single use instant hot packs come in two main varieties; one needed exposure to air and the other needing to mix with water. The first type is common among those that living in the cold as they will last much longer, and slowly release their warmth. Specifically, snow sports are a great recreation where these instant hot packs are common. They work by exposing solid iron metal to air where the oxygen combines to form an iron oxide, an exothermic reaction. Answer the following questions regarding this reaction. Be sure to show your work using dimensional analysis! 4 Fe (s) + 3 O2(g) → 2 Fe2O3 (s) AH = -1648 kJ CHEM 192 b. Let's say that you are out camping, and you decided to make coffee in the morning, but the only mg you have to heat up your coffee was the instant hot packs. In order to heat up your coffee (a small 12 oz cup specifically) would require you to need to provide about 146,443.5 kJ of heat, how many grams of iron would that require from your hot packs?