If the standard enthalpy of formation for CaCO3 is -1207.6 kJ mol when 30.7 g of calcium is reacted with an excess of carbon dioxide, how much heat is transferred? Would it be an exothermic reaction that releases 370.4 kJ of heat?

1 Answer
anor277
May 30, 2018

We have data for the reaction...

#Ca(s) + C(s) + 3/2O_2(g) rarr CaCO_3(s) + 1207.6*kJ#

Explanation:

Why? Because, by definition, #DeltaH_f^@#, is the energy associated with the formation of one mole of substance from its elements in their standard states under standard conditions.

Here I PRESUME you have performed the reaction....

#CaO(s) + CO_2(g) rarr CaCO_3(s)#

…(this is not quite your proposal...I think you mean calcium oxide not calcium metal)… BUT HERE you gots NO DATA!

Anyway, you will have to refine this question....

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