Consider the following problem. How much energy is evolved during the formation of 197 g of Fe, according to the reaction below? Fe203(s) + 2 Al(s)Al203(s) +2 Fe(s) AH°rxn -852 kJ 21. How do you find the correct answer to the problem question? ODH(rxn of 197 g of Fe) ratio of (#mol from 197g of Fe in reaction / 2 mol of Fe in equation) x DH(rxn of 2 mol of Fe). #mol from 197 g of is not known and should be determined next. O DH(rxn of 197 g of Fe) ratio of (2 mol of Fe in equation / #mol from 197g of Fe in reaction) x DH(rxn of 2 mol of Fe). #mol from 197 g of is not known and should be determined next. DH(rxn of 197 g of Fe) ratio of (#mol from 197g of Fe in reaction/ 2 mol of Fe in equation) / DH(rxn of 2 mol of Fe), #mol from 197 g of is not known and should be determined next.
Consider the following problem. How much energy is evolved during the formation of 197 g of Fe, according to the reaction below? Fe203(s) + 2 Al(s)Al203(s) +2 Fe(s) AH°rxn -852 kJ 21. How do you find the correct answer to the problem question? ODH(rxn of 197 g of Fe) ratio of (#mol from 197g of Fe in reaction / 2 mol of Fe in equation) x DH(rxn of 2 mol of Fe). #mol from 197 g of is not known and should be determined next. O DH(rxn of 197 g of Fe) ratio of (2 mol of Fe in equation / #mol from 197g of Fe in reaction) x DH(rxn of 2 mol of Fe). #mol from 197 g of is not known and should be determined next. DH(rxn of 197 g of Fe) ratio of (#mol from 197g of Fe in reaction/ 2 mol of Fe in equation) / DH(rxn of 2 mol of Fe), #mol from 197 g of is not known and should be determined next.
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Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
Question
Transcribed Image Text:Consider the following problem.
How much energy is evolved during the formation of 197 g of Fe, according to the
reaction below?
Fe203(s) + 2 Al(s) - Al203(s) + 2 Fe(s) AH°rxn = -852 kJ
21. How do you find the correct answer to the problem question?
ODH(rxn of 197 g of Fe) = ratio of (#mol from 197g of Fe in reaction / 2 mol of Fe
in equation) x DH(rxn of 2 mol of Fe). #mol from 197 g of is not known and
should be determined next.
O DH(rxn of 197 g of Fe) = ratio of (2 mol of Fe in equation / #mol from 197g of Fe
in reaction) x DH(rxn of 2 mol of Fe). #mol from 197 g of is not known and
should be determined next.
DH(rxn of 197 g of Fe) = ratio of (#mol from 197g of Fe in reaction / 2 mol of Fe
in equation) / DH(rxn of 2 mol of Fe). #mol from 197 g of is not known and
should be determined next.
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