Question

38. How many grams of calcium oxide is obtained on heating 100 g of CaCO,(s)?

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Answer 1

Answer:

Explanation:

CaCO3 (by heating)→CaO + CO2 (↑)

therefore, 1 mole of CaCO3 gives 1 mole of CaO…..

So, 1 mole of CaCO3 = 100g of CaCO3

AND 1 mole of CaO = (40+16)g=56g of CaO

So, 100g of CaCO3 gives 56 g of CaO on heating …..

Thanks for a good question…

Answer 2

CaCo3 = CaO + CO2

Change in Free Energy: ΔG(1000C) =-16.2kJ (negative, so the reaction runs)

Change in Enthalpy: ΔH(1000C) = +163.2kJ (positive, so the reaction is endothermic)

THIS REACTION PRODUCES 1MOL OF CaO ,MASS = 56.077g