Question

To decompose 100 gram of calcium carbonate into calcium oxide and carbon dioxide, 178kJ of heat must be supplied. Write the chemical equation, including the energy change value in kJ/mol, for the reaction.

Answer 1

CaCO3 arrow CaO + CO2 No of moles of CaCO3 in 100 g = given mass/molecular mass =100/100=1 moles For decomposition of CaCO3 178kJ/mole energy is required