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Titanium occurs naturally as the mineral rutile, TiO2. One possible method of extraction of titanium is to reduce the rutile by heating with carbon. TiO2(s) + 2C(s) Ti(s) + 2CO(g) → The standard enthalpy changes of formation of TiO2(s) and CO(g) are –940 kJ mol–1 and –110kJ mol–1 respectively. What is the standard enthalpy change of this reaction?

Respuesta :

Answer:

The standard entalpy change for the reaction is 720 kJ/mol

Explanation:

The chemical equation for the reaction is given as follows;

TiO₂ (s) + 2C → Ti (s)  + 2CO

The standard enthalpy changes of formation for TiOâ‚‚ (s) = -940 kJ/mol

The standard enthalpy changes of formation for CO (g) = -110 kJ/mol

The enthalpy change of the reaction = The enthalpy of the products - The enthalpy of the reactants

Given that there are two moles of CO, we have;

The enthalpy of the products= -110 × 2 = -220 kJ/mol

∴ The enthalpy change = -220 - (-940) = 720 kJ/mol

The standard entalpy change for the reaction = 720 kJ/mol.

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