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How much heat is evolved or absorbed in this problem?
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Limestone, CaCo3, when subjected to a temperature of 900 degrees Celsius in a kiln, decomposes to calcium oxide and carbon dioxide. How much heat is evolved or absorbed when one gram of limestone decomposes?

The standard enthalpies of formation at 25 degrees Celsius(kj/mol) of these compounds at 1 atm, Aqueous ions at 1 M is:

CaCO3 -1206.9
CaO -635.1
CO2 -393.5

  • chemistry -

    See your post above. n = 1 in this case.

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