Question

Calculate the standard enthalpy of formation for magnesium oxide (MgO) given the standard enthalpy of formation for magnesium (Mg) is -601.8 kJ/mol and the standard enthalpy of formation for oxygen (O₂) is 0 kJ/mol.

Answer 1

The standard enthalpy of formation for magnesium oxide  MgO  cannot be calculated using the given information. The standard enthalpy of formation for magnesium  Mg  and oxygen  O  are not enough to determine the standard enthalpy of formation for MgO.To calculate the standard enthalpy of formation for MgO, you would need the standard enthalpy of reaction for the formation of MgO from its elements:Mg  s  + 1/2 O  g   MgO  s If you have the standard enthalpy of reaction for this process, you can directly determine the standard enthalpy of formation for MgO.