The overall reaction in a commercial heat pack can be represented as4 Fe(s) +302 (9)2 Fe, O, (s) AH=-1652 kJa. How much heat is released when 4.00 moles of iron are reacted with excess O2?Heat =kJb. How much heat is released when 1.00 mole of Fe2O3 is produced?Heat =kJc. How much heat is released when 1.40 g iron is reacted with excess 02?HeatkJ%3Dd. How much heat is released when 10.8 g Fe and 1.50 g O2 are reacted?HeatkJ

Heat capacity of a substance or system indicates the amount of heat required to raise the…

Answered: The overall reaction in a commercial…

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Chemistry

The overall reaction in a commercial heat pack can be represented as 4 Fe(s) +302 (9)→ 2 Fe,O,(s) AH =-1652 kJ

World of Chemistry

7th Edition

ISBN:9780618562763

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter10: Energy

Section: Chapter Questions

Problem 61A

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Concept explainers

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

The overall reaction in a commercial heat pack can be represented as
4 Fe(s) +302 (9)2 Fe, O, (s) AH=-1652 kJ
a. How much heat is released when 4.00 moles of iron are reacted with excess O2?
Heat =
kJ
b. How much heat is released when 1.00 mole of Fe2O3 is produced?
Heat =
kJ
c. How much heat is released when 1.40 g iron is reacted with excess 02?
Heat
kJ
%3D
d. How much heat is released when 10.8 g Fe and 1.50 g O2 are reacted?
Heat
kJ

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