To what temperature must magnesium carbonate be heated to decompose it to MgO and CO2 at 1

Question:

To what temperature must magnesium carbonate be heated to decompose it to MgO and CO2 at 1 atm? Is this higher or lower than the temperature required to decompose CaCO3? Values of ∆Hof (in kJ/mol) are as follows: MgO(s), 601.2; MgCO3(s), 1111.7. Values of So (in J/K) are as follows: MgO(s), 26.9; MgCO3(s), 65.9. Data for CO2 are given in Tables 6.2 and 18.1.