Portable hot packs are available for skiers and other people engaged in other outdoor activities in a cold climste. The air-permeable paper packet contains s mbture of powdered iron, sodium chloride, and other components, all moistened by a little water. The exothermic reaction that produces the heat is a very common one, the rusting of iran: 4Fe(s)+3O2(s)2Fe2O3(s) When the outside plastic envelope is removed, O2 molecules penetrate the papeg causing the reaction to begin. A particuler packet cantains zoo. g of iron to warm your hands or feet for up to 4 hours. Calculate the amount of best (in lJ) associated with this reaction. Be sure your answer has the correct number of significant digits. Mote:-Reference the Thermodynamie propertles of pure substances table for additional information