H 06 EOC A-03 Thermochemistry 10 of 12> r Practice 6.12-Enhanced-with Feedback o
ID: 1034542 • Letter: H
Question
H 06 EOC A-03 Thermochemistry 10 of 12> r Practice 6.12-Enhanced-with Feedback o one mole of each substance according to the ients. In other words,- 1648 4 k.J of heat is released when 4 mol of Fe reacts with 3 mol of 02 to produce 2 mol of Fe0 Constants 1 Periodis Table Dry chemvical hand warmmers utlize the oxidation of iron to form lron oxide according to the following reaction AFe(o) + 302(E) 2Pe,0s(6) Part B Standard thermodynamic quantities for selected substances at 25 C Calculate how much heat (in kilojoules) a hand warmer containing 10 0 g of iron powder produces Express the energy in kilojoules to three significant figures. Reactant product Fel(s) ml) 0.0 0.0 824.2 peso,(01- ??? kJ Subm 0233RG401Explanation / Answer
From part a
Q = - 1648.4 kJ/mol
Mass of Fe = 10 g
Moles of Fe = mass/molecular weight
= 10g / 55.845g/mol
= 0.179 mol
Heat contained Q = - 1648.4 kJ/mol x 0.179 mol
= - 295.174 kJ
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