Using any resources available to you (e.g., textbook, CRC Handbook, online sources), obtain and use standard heats of formation and Hess' Law to calculate the standard heat of reaction AH° for the decomposition of H₂O2. Show ALL your work below, starting with the balanced equation, and summarize your results in the table provided. NOTE: Do NOT simply look up the value of AH for this reaction and write it below - you NEED to use standard heat of formation, show your work, etc. Heat of Formation for H₂O₂(aq) (kJ/mol) Heat of Formation for H₂O(1) (kJ/mol) Heat of Formation for O₂(g) (kJ/mol) Calculated AHpn (J/mol)
Using any resources available to you (e.g., textbook, CRC Handbook, online sources), obtain and use standard heats of formation and Hess' Law to calculate the standard heat of reaction AH° for the decomposition of H₂O2. Show ALL your work below, starting with the balanced equation, and summarize your results in the table provided. NOTE: Do NOT simply look up the value of AH for this reaction and write it below - you NEED to use standard heat of formation, show your work, etc. Heat of Formation for H₂O₂(aq) (kJ/mol) Heat of Formation for H₂O(1) (kJ/mol) Heat of Formation for O₂(g) (kJ/mol) Calculated AHpn (J/mol)
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter12: Thermodynamic Processes And Thermochemistry
Section: Chapter Questions
Problem 44P
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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:Question is attached in the image. I am
using the following balanced reaction: 2H2
02 (aq) => 2H2O (1) + O2 (g) Heat of
formation of H2O2: -187.6 KJ/mol Heat of
formation of H2O: -285.8 KJ/mol Heat of
formation of O2: 0 KJ/mol I get a value
close to 200 KJ/mol that I do not think is
correct.
Transcribed Image Text:Using any resources available to you (e.g., textbook, CRC Handbook, online sources), obtain and
use standard heats of formation and Hess' Law to calculate the standard heat of reaction AH° for
the decomposition of H₂O2. Show ALL your work below, starting with the balanced equation, and
summarize your results in the table provided. NOTE: Do NOT simply look up the value of AH for this
reaction and write it below - you NEED to use standard heat of formation, show your work, etc.
Heat of Formation for H₂O₂(aq) (kJ/mol)
Heat of Formation for H₂O(1) (kJ/mol)
Heat of Formation for O₂(g) (kJ/mol)
Calculated AHxn (J/mol)
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