BOND BREAKING AND BOND MAKING:
Determine by calculations and energy level diagrams, to proof whether these two reactions are endothermic or exothermic reactions..
1. Methane burns in oxygen
2. Nitrogen (II) reacting with oxygen producing nitrogen monoxide..
please anyone just help.. I would really appreciate... Thanks.
To determine whether a reaction is endothermic or exothermic, you need to compare the energy required to break the bonds in the reactants (bond-breaking) with the energy released when bonds form in the products (bond-making). You can perform calculations based on bond energies and use energy level diagrams to visualize the change in energy during the reaction. Here's how you can approach these two reactions:
1. Methane (CH4) burns in oxygen (O2):
First, you need to determine the bonds present in the reactants (methane and oxygen) and products (carbon dioxide and water). The bond energies can be found in tables or databases.
- Reactants: CH4 + O2
- Products: CO2 + H2O
To calculate the energy change for this reaction, you need to subtract the total energy required to break the bonds in the reactants from the total energy released when bonds form in the products.
2. Nitrogen (II) reacting with oxygen (O2) to produce nitrogen monoxide (NO):
Again, you need to determine the bonds present in the reactants (nitrogen and oxygen) and the product (nitrogen monoxide).
- Reactants: N2 + O2
- Product: 2NO
Calculate the energy change for this reaction by subtracting the total energy required to break the bonds in the reactants from the total energy released when bonds form in the product.
In both cases, you would compare the energy change to determine whether it is positive (endothermic) or negative (exothermic). If the energy change is positive, it is an endothermic reaction, meaning it requires energy input. If the energy change is negative, it is an exothermic reaction, meaning it releases energy.
Energy level diagrams can also be used to visualize the energy changes throughout the reaction. The reactants' energy level would be higher than the products' energy level in an exothermic reaction, while in an endothermic reaction, the products' energy level would be higher than the reactants' energy level.
Keep in mind that these calculations and energy level diagrams involve a simplified model of a reaction. In reality, there might be additional factors that could influence the overall energy change.