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.

Question

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. (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

The enthalpy change for the given reaction is not an enthalpy of formation of calcium carbonate, since CaCO3 has been formed from other compounds, and not from its constituent elements.

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

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

The enthalpy change for the given reaction is not an enthalpy of formation of calcium carbonate, since $C a C O_{3}$ has been formed from other compounds, and not from its constituent elements.

Q. 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.