What is the enthalpy for the following reaction?overall: N2O4¬→2NO2Express your answer numerically in kilojoules per mole.• View Available Hint(s)| ΑΣφ?ΔΗ-kJ/molSubmitProvide FeedbackMasteriWordB.AIRAIR Learning Goal:The change in enthalpy, AH, is the heat absorbed or produced duringany reaction at constant pressure. Hess's law states that AH for anoverall reaction is the sum of the AH values for the individualreactions. For example, if we wanted to know the enthalpy change forthe reaction3Mn + 302 3MNO2we could calculate it using the enthalpy values for the followingindividual steps:Step 1: 4Al+302 2Al2O3Step 2: 3Mn+ 2A½O3→3MNO2 +4AlOverall: 3Mn +302→3MNO2If the enthalpy change is -3352 kJ/mol for step 1 and1792 kJ/mol for step 2, then the enthalpy change for the overallreaction is calculated as follows:AH =-3352+1792 ==-1560 kJ/molIt is also important to note that the change in enthalpy is a statefunction, meaning it is independent of path. In other words, the sum ofthe AH values for any set of reactions that produce the desiredproduct from the starting materials gives the same overall AH.9Type here to searchProvide Fe

Given reaction is : N2O4 (g) <--------------> 2NO2 (g) , ΔH = ? Change in enthalpy of the…

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What is the enthalpy for the following reaction? overall: N2O4→2NO2 Express your answer numerically in kilojoules per mole. • View Available Hint(s) ? nνα ΑΣφ kJ/mol ΔΗ -

Living By Chemistry: First Edition Textbook

1st Edition

ISBN:9781559539418

Author:Angelica Stacy

Publisher:Angelica Stacy

ChapterU5: Fire: Energy , Thermodynamics, And Oxidation-reduction

SectionU5.12: Over The Hill: Reversing Reactions

Problem 4E

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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

What is the enthalpy for the following reaction?
overall: N2O4¬→2NO2
Express your answer numerically in kilojoules per mole.
• View Available Hint(s)
| ΑΣφ
?
ΔΗ-
kJ/mol
Submit
Provide Feedback
Masteri
Word
B.
AIRAIR

Learning Goal:
The change in enthalpy, AH, is the heat absorbed or produced during
any reaction at constant pressure. Hess's law states that AH for an
overall reaction is the sum of the AH values for the individual
reactions. For example, if we wanted to know the enthalpy change for
the reaction
3Mn + 302 3MNO2
we could calculate it using the enthalpy values for the following
individual steps:
Step 1: 4Al+302 2Al2O3
Step 2: 3Mn+ 2A½O3→3MNO2 +4Al
Overall: 3Mn +302→3MNO2
If the enthalpy change is -3352 kJ/mol for step 1 and
1792 kJ/mol for step 2, then the enthalpy change for the overall
reaction is calculated as follows:
AH =-3352+1792 ==-1560 kJ/mol
It is also important to note that the change in enthalpy is a state
function, meaning it is independent of path. In other words, the sum of
the AH values for any set of reactions that produce the desired
product from the starting materials gives the same overall AH.
9Type here to search
Provide Fe

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