Propane is used in the central heating system where it's enthalpy change is -2220kj.draw a labeled energy profile diagram for this reaction.
To draw a labeled energy profile diagram for the enthalpy change of propane in a central heating system, you first need to understand the basic structure of an energy profile diagram.
An energy profile diagram is a graphical representation of energy changes that occur during a chemical reaction. It shows the energy of the reactants, the energy of the products, and the energy changes that occur throughout the reaction.
In this case, we need to represent the enthalpy change of propane in the central heating system, which is -2220 kJ.
To create a labeled energy profile diagram for this reaction, follow these steps:
1. Draw a horizontal line to represent the energy axis.
2. Label the left end of the line as "Reactants" and the right end as "Products".
3. Choose a suitable scale for the energy axis and label it in kilojoules (kJ).
4. Mark the energy level of the reactants on the left side of the diagram. Since we're dealing with the enthalpy change of propane, this energy level will be higher than that of the products. Let's assume the energy level of the reactants is 0 kJ.
5. Mark the energy level of the products on the right side of the diagram. Since the enthalpy change is -2220 kJ (exothermic reaction), the energy level of the products will be lower than that of the reactants. Let's assume the energy level of the products is -2220 kJ.
6. Draw a curve or line connecting the energy levels of the reactants and products. The shape of this curve will depend on the reaction mechanism, but for simplicity, let's assume a single-step reaction with a simple curve. The curve should start at the energy level of the reactants and end at the energy level of the products.
7. Label the curve as "Reaction Progress" or "Reaction Coordinate".
8. Mark the enthalpy change (-2220 kJ) on the diagram. You can show it as a vertical line or an arrow at the appropriate energy level.
9. Include any necessary additional labels or annotations to clarify the diagram, such as indicating the enthalpy change value and labeling the axes.
Your final labeled energy profile diagram should illustrate the enthalpy change of propane in the central heating system as an exothermic reaction, with the reactants at a higher energy level (0 kJ) and the products at a lower energy level (-2220 kJ). The curve connecting them represents the reaction progress.
Please note that the specific shape and style of the diagram may vary based on the reaction mechanism and the level of detail you want to include.