1 Using the table values calculate thermal effect of reaction Delta H form reactions): 2Mg(cr)+CO_(2)(g)=2MgO(cr)+C(

To calculate the thermal effect of the reaction (ΔH) using the given table values, we need to follow these steps:<br /><br />1. Identify the standard enthalpies of formation (ΔHf°) for each compound involved in the reaction from the table.<br />2. Use the formula:<br /> ΔH = Σ [ΔHf°(products)] - Σ [ΔHf°(reactants)]<br />3. Substitute the values from the table into the formula and calculate the final result.<br /><br />Let's start by identifying the standard enthalpies of formation for each compound:<br /><br />- Mg (cr): ΔHf° = 0 (element in its standard state)<br />- CO2 (g): ΔHf° = -393.5 kJ/mol<br />- MgO (cr): ΔHf° = -601.6 kJ/mol<br />- C (s): ΔHf° = 0 (element in its standard state)<br /><br />Now, we can substitute these values into the formula:<br /><br />ΔH = [2(-601.6 kJ/mol) + 1(-393.5 kJ/mol)] - [2(0) + 1(-393.5 kJ/mol)]<br />ΔH = [-1203.2 kJ/mol - 393.5 kJ/mol] - [0 - 393.5 kJ/mol]<br />ΔH = -1596.7 kJ/mol + 393.5 kJ/mol<br />ΔH = -1203.2 kJ/mol<br /><br />Therefore, the thermal effect of the reaction (ΔH) is -1203.2 kJ/mol.