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Portable hot packs are available for skiers and people engaged in other outdoor activities in a cold climate. The air-permeable paper packet contains a mixture 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 iron.
When the outside plastic envelope is removed, O2 molecules penetrate the paper, causing the reaction to begin. A typical packet contains 250 g of iron to warm your hands or feet for up to 4 hours. Using data from Appendix 2, determine how much heal (in kilojoules) is produced by this reaction.
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Chapter 10 Solutions
Chemistry Atoms First, Second Edition
- Please correct answer and don't use hand ratingarrow_forwardwhen a 0.150 g sample of the compound was burned, it produced 0.138 g CO2 & 0.0566 g H2O. All the nitrogen in a different 0.200 g sample of the compound was converted to NH3, which was found to weigh 0.0238 g. Finally, the chlorine in a 0.125 g sample of the compound was converted to Cl- and by reacting it with AgNO3, all of the chlorine was recovered as the solid AgCl. The AgCl, when dried was found to weigh 0.251 g. What is the empirical formulaarrow_forwardPlease correct answer and don't use hand rating and don't use Ai solutionarrow_forward
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