1. Tardigrade
  2. Question
  3. Chemistry
  4. Assertion: The enthalpy change for the reaction CaO(s) + CO2(g) → CaCO3(s) is called enthalpy of formation of calcium carbonate. Reason: The reaction involves formation of 1 mole of CaCO3 from its constituent elements.

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Q. Assertion : The enthalpy change for the reaction $CaO_{(s)} + CO_{2(g)} \to CaCO_{3(s)}$ is called enthalpy of formation of calcium carbonate.
Reason : The reaction involves formation of $1$ mole of $CaCO_3$ from its constituent elements.

Thermodynamics

Solution:

The enthalpy change for the given reaction is not an enthalpy of formation of calcium carbonate, since $CaCO_3$ has been formed from other compounds, and not from its constituent elements.