Problem: Thermodynamic Quantities for Selected Substances at 298.15 KSubstanceΔH˚f (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)-421.3For NaBr(s) find the value of ΔH˚f.

FREE Expert Solution

Balanced Reaction: 2Na(s) + Br2(g) → 2 NaBr(s)

∆Hrxn=∆Hf,products-∆Hf,reactants

94% (497 ratings)
View Complete Written Solution
Problem Details

Thermodynamic Quantities for Selected Substances at 298.15 K

SubstanceΔH˚f (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


For NaBr(s) find the value of ΔH˚f.

Learn this topic by watchingEnthalpy of Formation Concept Videos
All Chemistry Practice Problems Enthalpy of Formation Practice Problems
Q.A gas-phase reaction was run in an apparatus designed to maintain a constant pressure.Write a balanced chemical equation for the reaction depicted.
Q.Complete combustion of 1 mol of acetone (C3H6O) liberates 1790 kJ:C3H6O(l) + 4O2(g) → 3CO2(g) + 3H2O(l)  ΔHo= - 1790Using this information together wi...
Q.Thermodynamic Quantities for Selected Substances at 298.15 KSubstanceΔH˚f (kJ/mol)NO(g)90.37NO2(g)33.84N2O(g)81.6N2O4(g)9.66SO2(g)-296.9SO3(g)-395.2Na...
Q.Write a balanced chemical equation depicting the formation of one mole of C2H5OH(l) from its elements in their standard states.
See all problems in Enthalpy of Formation

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Enthalpy of Formation concept. You can view video lessons to learn Enthalpy of Formation. Or if you need more Enthalpy of Formation practice, you can also practice Enthalpy of Formation practice problems.