Help with reaction CO+NO2 = CO2 + NO and activation energy for reverse

[talkshow.on.mut]

For the reaction CO+NO2 = CO2 + NO, the activation energy for the forward reaction is 135 Kj/mol of CO reacted. a) Determine the heat of the reaction. b) From the data given, and the delta Hr for the reaction, determine the activation energy for the reverse reaction. c) Draw and label a potential energy diagram for the reaction.

 

[Navin A S]

a) The heat of the reaction is -135 Kj/mol of CO reacted.b) The activation energy for the reverse reaction is also 135 Kj/mol of CO reacted.c)POTENTIAL ENERGY DIAGRAMCO + NO2 → CO2 + NOEact |-----------------------| | | | | | | | |Ereact ----------------------where Ereact is the energy of the reactants, and Eact is the energy of the products.

 

[ravenprp]

a) To determine the heat of the reaction, we need to use the formula ΔH = ΔE + PΔV, where ΔE is the change in internal energy, P is the pressure, and ΔV is the change in volume. Since the reaction is at constant pressure and there is no change in volume, ΔV = 0. Therefore, the heat of the reaction is equal to the change in internal energy, which is the difference in energy between the products and reactants. In this case, the heat of the reaction is equal to the energy released during the forward reaction, which is 135 Kj/mol of CO reacted.

b) The reverse reaction has the same ΔH as the forward reaction, but with opposite sign. Therefore, the activation energy for the reverse reaction is also 135 Kj/mol of CO2 formed.

c) The potential energy diagram for this reaction would look like a typical exothermic reaction, with the products (CO2 and NO) at a lower energy level than the reactants (CO and NO2). The activation energy for the forward reaction would be shown as a peak on the curve, while the activation energy for the reverse reaction would be shown as a dip on the curve. The potential energy of the reactants would be higher than the potential energy of the products, indicating that energy is released during the reaction. The labels for the different energy levels and the activation energies would be included on the diagram.