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23 Nov 2019

Quicklime (CaO) can be made by thermally decomposing CaCO3. Whatvolume of CO2 (at 1.0 atm pressure and 25°C) is produced when 152 gof CaCO3 react to completion? Please give your answer inliters.

The reaction is:
CaCO3 --> CaO + CO2

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Nestor Rutherford
Nestor RutherfordLv2
10 Nov 2019

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Related questions

When solid CaCO3 is heated, it decomposes to give solid CaO and CO2 gas. A volume of 425 mL of gas is collected over water as a total pressure of 758 mmHg and 16 degrees C. The vapor pressure of the water at 16 degrees C is 14 mmHg; CaCO3(s)-->CaO(s)+CO2(g): a) what is the partial pressure of the CO2 gas? b) How many moles of CO2 gas were in the CO2 gas sample?

Limestone (CaCO3) is converted to calcium oxide (CaO) in a continuous kiln. The conversion process is represented by the following reaction: CaCO3(s) CaO(s) + CO2 (g) The energy to decompose the limestone is supplied by the combustion of CH4 in direct contact with the limestone using 50% excess dry air. The CaCO3 and air enter the process at 25 °C, and CaO exits at 900 °C. The product gases exit at 200 °C. Using the heat of reaction approach and the heat of formation and sensible heat approach, calculate the maximum number of kg of CaCO3 that can be processed per 1000 m3 of CH4 measured at standard conditions (i.e., 0 °C and 1 atm for gases). Show that the two approaches will produce similar results.

H o f, CH4, gas = -74.84 kJ/mol

Cp (for all gases and vapors): 30 J/mol.K

H o f, CaCO3, solid = -1206.9 kJ/mol Cp,CaCO3(s) = 234.5 J/mol.K

H o f, CaO, solid = -635.6 kJ/mol

Cp,CaO(s) = 111.8 J/mol.K

H o f, CO2, gas = -393.51 kJ/mol

H o f, H2O, gas = -241.83 kJ/mol


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