Answer:
= - 262.58 kJ
Explanation:
From the reaction:
Ca(OH)₂(s) + CO₂(g) → CaCO₃(s) + H₂O(g) ΔH = –69.1 kJ.
For 1 mole of CaCO₃ to be formed, 69.1 kilo joules energy will be released.
Therefore; for 3.8 moles of CaCO₃ to be formed, the amount of energy released will be;
= 3.8 moles × -69.1 kJ
= -262.58 kJ
The negative sign shows that the reaction is exothermic and energy is released to the surrounding. Therefore, for 3.8 moles of CaCO₃ to be formed an energy of 262.58 kJ will be released.
