Upon heating, calcium carbonate decomposes to produce calcium oxide and carbon dioxide. What is the theoretical yield of #CO_2# if 235.0 g #CaCO_3# is heated?

1 Answer
anor277
Mar 17, 2016

Approx. 100 g of carbon dioxide gas are evolved.

Explanation:

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

There is thus a 1:1 molar equivalence of carbonate to carbon dioxide.

#"Moles of calcium carbonate"# #=# #(235.0*g)/(100.0869*g*mol^-1)# #=# #2.35# #mol#.

So, by reaction stoichiometry, #2.35# #mol# #CO_2(g)# are evolved.

If conversion is quantitative, there are #2.35# #mol# #xx# #44.0*g*mol^-1# #CO_2# #=# #??g#

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