Balancing Chemical Equations Video Lessons

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Concept: Balancing Chemical Reactions

Problem: Thermodynamic Quantities for Selected Substances at 298.15 KSubstanceHfo (kJ/mol)NO(g)90.37NO2(g)33.84N2O(g)81.6N2O4(g)9.66SO2(g)-296.9SO3(g)-395.2NaBr(s)-361.4NaBr(aq)-360.6Pb(NO3)2(s)-451.9Pb(NO3)2(aq)-421.3Write a balanced equation depicting the formation of one mole of Pb(NO3)2(s) from its elements in their standard states.

FREE Expert Solution

We’re being asked to determine the balanced chemical equation for the reaction used to calculate the standard enthalpy for the formation of Pb(NO3)2(s)


Recall that the standard enthalpy of formation (ΔH˚f) refers to the enthalpy change for the formation of 1 mole of a compound from its elements in their standard states.


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Problem Details

Thermodynamic Quantities for Selected Substances at 298.15 K

SubstanceHfo (kJ/mol)
NO(g)90.37
NO2(g)33.84
N2O(g)81.6
N2O4(g)9.66
SO2(g)-296.9
SO3(g)-395.2
NaBr(s)-361.4
NaBr(aq)-360.6
Pb(NO3)2(s)-451.9
Pb(NO3)2(aq)-421.3


Write a balanced equation depicting the formation of one mole of Pb(NO3)2(s) from its elements in their standard states.

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