Question

The enthalpy associated with the formation of one mole quantities of calcium oxide, and carbon dioxide, from calcium carbonate is `+178*kJ`. How do we represent this reaction symbolically?

Answer 1

`CaCO_3(s) + DeltaH rarr CaO(s) + CO_2(g)uarr`

Explanation:

`"Moles of calcium carbonate"` `=` `(100*g)/(100.09*g*mol^-1)=1*mol.`

And thus for:

`CaCO_3(s) + DeltaH rarr CaO(s) + CO_2(g)uarr;` `DeltaH=178*kJ*mol^-1" of reaction as written"`

Given that it is endothermic reaction, we quote `DeltaH_"rxn"=+178*kJ*mol^-1`.

I can think of one industry where the reaction is utilized on a monumental scale. Can you identify it?