Standard molar enthalpy of SrCO3?

Given the following data:





SrO (s) + CO2 (g) --%26gt; SrCO3 (s) delta H= -234 kJ





2 Sr (s) + O2 (g) --%26gt; 2 SrO (s) delta H= -1184kJ





C (graphite) + O2 (g) --%26gt; CO2 (g) delta H= = -394





Calculate the standard molar enthalpy of formation for SrCO3 (s).

Standard molar enthalpy of SrCO3?
delta H for the reaction is the sum of all of the steps needed to get to the endpoint, namely the reactions you've listed





delta H =-1812 kJ/mol
Reply:The first one, plus half the second one, plus the third one!





Add them all up in the quantities that I have stated.