Carbon dioxide is also released into the atmosphere when calcium carbonate rock
ID: 531093 • Letter: C
Question
Carbon dioxide is also released into the atmosphere when calcium carbonate rock (limestone) is heated to produce the quicklime, i.e. calcium oxide, used in the manufacture of cement: CaCO_3(s) rightarrow CaO(s) + CO_2(g) Calculate the mass, in metric tons, of CO_2 released per metric ton of limestone used in this process. What is the mass of carbon that the air gains for each gram of carbon dioxide that enters the atmosphere? (Notice that at least as much again carbon dioxide is released from combustion of the fossil fuel needed to heat the limestone as is released from the limestone itself.)Explanation / Answer
Answer: 0.44012metric tons of CO2 released per metric ron of lime stone used in this process.
Explanation:
One metric ton or 1000Kg or 1000000g of CaCO3 means [1000000/99.95] moles or 10005 moles of CaCO3 since the molecular weight is 99.95.
One equivalent of CaCO3 is going to form one equivalent of CO2, Hence 10005 moles of CaCO3 is going to form 10005 moles of CO2 ( the molecular weight of CO2 is 43.99). Hence [10005 X 43.99]g or 440120.1g or 0.44012metric tons of CO2 released per metric ron of lime stone used in this process.
The molecular weight of CaCO3 is
Answer: 0.2727g of the mass of carbon that the air gains for each gram of carbondioxide that enters the atmosphere.
Explanation. The molecular weight of Carbon dioxde is 43.99. Hence in 1.00 g of CO2,
the number of moles = 1/ (43.99)= 0.022732 mol. The mass of carbon present = 0.022732 X 12 = 0.2727g