Вопрос
1 Using the table values calculate thermal effect of reaction Delta H form reactions): 2Mg(cr)+CO_(2)(g)=2MgO(cr)+C(
Решения
4.1
(264 Голоса)
Екатерина
Экспертная проверка
мастер · Репетитор 5 лет
Ответ
To calculate the thermal effect of the reaction (ΔH) using the given table values, we need to follow these steps:1. Identify the standard enthalpies of formation (ΔHf°) for each compound involved in the reaction from the table.2. Use the formula: ΔH = Σ [ΔHf°(products)] - Σ [ΔHf°(reactants)]3. Substitute the values from the table into the formula and calculate the final result.Let's start by identifying the standard enthalpies of formation for each compound:- Mg (cr): ΔHf° = 0 (element in its standard state)- CO2 (g): ΔHf° = -393.5 kJ/mol- MgO (cr): ΔHf° = -601.6 kJ/mol- C (s): ΔHf° = 0 (element in its standard state)Now, we can substitute these values into the formula:ΔH = [2(-601.6 kJ/mol) + 1(-393.5 kJ/mol)] - [2(0) + 1(-393.5 kJ/mol)]ΔH = [-1203.2 kJ/mol - 393.5 kJ/mol] - [0 - 393.5 kJ/mol]ΔH = -1596.7 kJ/mol + 393.5 kJ/molΔH = -1203.2 kJ/molTherefore, the thermal effect of the reaction (ΔH) is -1203.2 kJ/mol.