What is the standard enthalpy of formation of the isomer C8H18 if the enthalpy change for its complete combustion is -5470 kJ/mol?

Choose the reaction that illustrates the standard enthalpy of formation (ΔHf°) for Ca(NO2)2.

Which of the following reactions represents the standard enthalpy of formation (ΔHₒƒ) for CsHSO4(s)?

Consider the combination reaction: 2Mg(s) + O2(g) → 2MgO(s) with ΔH = -1204 kJ. What is the enthalpy change for the decomposition of 1 mole of MgO(s) into Mg(s) and O2(g)?

Which of the following statements correctly describes the calculation of the enthalpy change (ΔH_rxn) for a chemical reaction using bond enthalpies?

For which of the following reactions is the enthalpy change for the reaction equal to the standard enthalpy of formation (ΔHf°) of the product?

The enthalpy change for the following reaction is -483.6 kJ: 2 H2 (g) + O2 (g) --> 2 H2O (g). Therefore, the enthalpy change for the following reaction is ________ kJ: 6 H2O (g) --> 6 H2 (g) + 3 O2 (g).

Given the reaction Pb (s) + CO2 (g) → PbO (s) + CO (g) with ΔH° = +131.4 kJ, and the standard enthalpies of formation ΔHf° of CO2(g) = -393.5 kJ/mol and CO(g) = -110.5 kJ/mol, what is the standard enthalpy of formation for PbO(s)?

The enthalpy for the formation of 1 mole of NH₃(aq) is -80.29 kJ/mol. What is the enthalpy for the formation of 3 moles of NH₃(aq)?