Chemistry - Pressure and Stoichiometry (Please help i just want to go to sleep now...!)?

L

london

New member
(1)

When calcium carbonate is heated strongly, carbon dioxide gas is released.

CaCO3(s) ---> CaO(s) + CO2(g)

What volume of CO2(g), measured at STP, is produced if 12.7 g of CaCO3(s) is heated?


(2)

When calcium carbonate is heated strongly, carbon dioxide gas is evolved.

CaCO3(s) ---> CaO(s) + CO2(g)

If 4.61 g of calcium carbonate is heated, what volume of CO2(g) would be produced when collected at 24°C and 0.987 atm?
 
moles CaCO3 = 12.7 g / 100.086 g/mol=0.127
= moles CO2
V = 0.127 x 22.4 =2.84 L

Moles CaCO3 = 4.61 /100.086=0.0460
= moles CO2
T = 24 + 273=297 K
V = nRT/p= 0.0460 x 0.08206 x 297/ 0.987=1.14 L
 
Back
Top