Based on the thermochemical equation for the decomposition of calcium carbonate CaCO3 (solid)

Based on the thermochemical equation for the decomposition of calcium carbonate CaCO3 (solid) = CaO (solid) + CO2 (g) – 157 kJ, calculate how much heat must be spent for decomposition: a) 2.5 mol; b) 10 g; c) 1 kg of calcium carbonate.

CaCO3 = CaO + CO2 – 157 kJ / mol, that is, so much heat will be released for each mol.

M (CaCO3) = 100g / mol

A) -392.5 (-157 * 2.5 mol), i.e. 1 mol spent -157, and 2.5 mol -392.5

B) -15.7 (-157 * 0.1), i.e. 10 g is 0.1 mol (10 (g) / 100 (g / mol))

B -1570 (10 * (-157), i.e. in 1 kg 10 mol