How many components are there when caco3 is heated in a closed tube?
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When CaCO3, CaO and CO2 are in equilibrium, the
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Charles S. Oakes, PhD Geochemist
Answered Jul 22, 2016 · Author has 228 answers and 188.9k answer views
1st there’s the Gibbs Phase rule which can be rearrange to P = C - F + 2 where P is number of phases, C is the number of components (roughly described as the minimum number of chemical species that are necessary to create all of the species in the system), and F is the number of degrees of freedom. If your system is a solid = solid + gas equilibrium, the system is closed, and either pressure (p) or temperature (T) is fixed, then the other p-T variable will also be fixed at equilibrium so F = 1. The minimum number of components for the system you described is 2 (CaO and CO2) if we assume the conditions are such that no other substances such as CO are being formed. So if you plug those numbers into the equation you’ll get P = 3.
Trading isn't about predicting what happens next. It's about having a system with an edge.
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1 ANSWER

Charles S. Oakes, PhD Geochemist
Answered Jul 22, 2016 · Author has 228 answers and 188.9k answer views
1st there’s the Gibbs Phase rule which can be rearrange to P = C - F + 2 where P is number of phases, C is the number of components (roughly described as the minimum number of chemical species that are necessary to create all of the species in the system), and F is the number of degrees of freedom. If your system is a solid = solid + gas equilibrium, the system is closed, and either pressure (p) or temperature (T) is fixed, then the other p-T variable will also be fixed at equilibrium so F = 1. The minimum number of components for the system you described is 2 (CaO and CO2) if we assume the conditions are such that no other substances such as CO are being formed. So if you plug those numbers into the equation you’ll get P = 3.
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