Consider the reactionNaz CO3 (s)→Na2 0(s) + CO2 (g)with enthalpy of reactionΔΗΧWhat is the enthalpy of formation of Na20(s)?321.5kJ/molExpress your answer in kilojoules per mole to one decimal place. Enthalpy H is a measure of the energy content of asystem at constant pressure. Chemical reactionsinvolve changes in enthalpy, AH, which can bemeasured and calculated:-Σροoducts mΔΗ-Σactants ηΔΗwhere the subscript "rxn" is for "enthalpy of reaction"and "f" is for "enthalpy of formation" and m and nrepresent the appropriate stoichiometric coefficients foeach substance.The following table lists some enthalpy of formationvalues for selected substances.SubstanceAH÷° (kJ/mol)CO2 (g)-393.5NaOH(s)-426.7H20(1)-285.8Na2 CO3 (s)-1131.0H2O(g)-241.8

Enthalpy change is the amount of heat evolved or absorbed in a reaction carried out at constant…

Consider the reaction Naz CO3 (s)→Na2O(s) + CO2(g) with enthalpy of reaction AHrxn° = 321.5kJ/mol What is the enthalpy of formation of Na2 0(s)? Express your answer in kilojoules per mole to one decimal place.

Consider the reaction Naz CO3 (s)→Na2O(s) + CO2(g) with enthalpy of reaction AHrxn° = 321.5kJ/mol What is the enthalpy of formation of Na2 0(s)? Express your answer in kilojoules per mole to one decimal place.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

Consider the reaction
Naz CO3 (s)→Na2 0(s) + CO2 (g)
with enthalpy of reaction
ΔΗΧ
What is the enthalpy of formation of Na20(s)?
321.5kJ/mol
Express your answer in kilojoules per mole to one decimal place.

Enthalpy H is a measure of the energy content of a
system at constant pressure. Chemical reactions
involve changes in enthalpy, AH, which can be
measured and calculated:
-Σροoducts mΔΗ-Σactants ηΔΗ
where the subscript "rxn" is for "enthalpy of reaction"
and "f" is for "enthalpy of formation" and m and n
represent the appropriate stoichiometric coefficients fo
each substance.
The following table lists some enthalpy of formation
values for selected substances.
Substance
AH÷° (kJ/mol)
CO2 (g)
-393.5
NaOH(s)
-426.7
H20(1)
-285.8
Na2 CO3 (s)
-1131.0
H2O(g)
-241.8

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