Consider the thermal decomposition of CaCO3: CaCO3(s) CaO(s) + CO2(g) The equilibrium vapor pressures of CO2
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CaCO3(s) ⇌ CaO(s) + CO2(g)
The equilibrium vapor pressures of CO2 are 22.6 mmHg at 700°C and 1829 mmHg at 950°C. Calculate the standard enthalpy of the reaction.
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