CaCO3 --->(heat) CaO + CO2
How much heat is needed for turning 2 grams of CaCO3 into CaO and CO2

Temperatures above 680°C decomposition starts. Save reaction is at 900° C.  In industrical oven it's used 1000 - 1300 °C.

Edited January 6, 20232 yr by chenbeier

45 minutes ago, observer1 said:

CaCO3 --->(heat) CaO + CO2
How much heat is needed for turning 2 grams of CaCO3 into CaO and CO2

 

Answering the actual question

 

When 1mol of calcium carbonate decomposes into 1mol of calcium oxide and 1mol of carbon dioxide, 177.8kJ of heat is absorbed.

Thats correct, for calculating the conversion of the given mass. But the head line asked for decomposition  temperature. So different questions.

Edited January 6, 20232 yr by chenbeier

3 hours ago, studiot said:

 

Answering the actual question

 

When 1mol of calcium carbonate decomposes into 1mol of calcium oxide and 1mol of carbon dioxide, 177.8kJ of heat is absorbed.

So, answering the actual, actual question😃, since MW of CaCO3 is 40+12 + (16x3) = 100, 2g would absorb 2/100 x 177.8 = 3.556kJ, wouldn't it?  

Yes correct.

40 minutes ago, exchemist said:

So, answering the actual, actual question😃, since MW of CaCO3 is 40+12 + (16x3) = 100, 2g would absorb 2/100 x 177.8 = 3.556kJ, wouldn't it?  

fair comment +1