Answer:
Explanation:
2Al(s) + Fe₂O₃(s) ⟶ Al₂O₃(s) + 2Fe(s); ΔᵣH = ?
The formula for calculating the enthalpy change of a reaction by using the enthalpies of formation of reactants and products is
2Al(s) + Fe₂O₃(s) ⟶ Al₂O₃(s) + 2Fe(s)
ΔfH°/kJ·mol⁻¹: 0 -824.3 -1675.7 0
Explanation:
Since, it is shown that the reaction has been reversed. Therefore, value of will become .
Hence, new
=
= 20
Also, the number of moles of each reactant has been halved. So, for the reaction will also get halved.
Therefore, = =
= 4.47
As the value of is given as +39.0 kJ. So, it means that the reaction is endothermic in nature. So, energy of reactants will be more than the products. Hence, according to Le Chatelier's principle reaction will move in the forward direction.
As a result, will also increase with increase in temperature.
The answer is D) Electromagnetic energy. This is not a type of energy that occurs when a vehicle is moving.
If you need to translate, the answer is
Chemical agents concept