Wiki User
∙ 5y agoWant this question answered?
Be notified when an answer is posted
If you plot the reaction coordinate (what I think you mean by "enthalpy change diagram"), the reaction will be exothermic if the products are lower on the graph than the reactants. If they are higher than it is endothermic. For instance, if you go to the linked Wikipedia page (link to the left of this answer), the graph shown is of an exothermic reaction.
Any catalyst will make a chemical reaction easier or quicker to happen by lowering the activation energy. On a energy diagram, you will see a lower "hill" for activation energy, which corresponds to less energy required to begin the reaction.
Often times in science individuals become bogged down in the abstract thinking of higher level mathematics. If one were to draw out a particle diagram the visualization may assist the individual in understanding the interactions taking place.
Since we cannot see the diagram.... we CANNOT help you !!!
well.. a chemical weathering process is acid rain, so you could do a particle diagram for fizzing- reaction with acid rain. or. a physical weathering process is melting, so you could do a particle diagram for melting. hope this has helped :).
If you plot the reaction coordinate (what I think you mean by "enthalpy change diagram"), the reaction will be exothermic if the products are lower on the graph than the reactants. If they are higher than it is endothermic. For instance, if you go to the linked Wikipedia page (link to the left of this answer), the graph shown is of an exothermic reaction.
Whether the reaction is endothermic or exothermic
A graph of Potential energy Vs time The changes in energy during a reaction <APEX>
D C. Hickson has written: 'Pressure-Enthalpy diagram for refrigerant 12 (dichlorodifluoromethane CF2C12)' 'Enthalpy-entropy diagram for steam: SI [units]'
Calculating the mass of reactants and products in a chemical reaction is a sufficient demonstration.
Energy diagram.
compression
The refrigerant is at constant pressure
its difficult to illustrate on this but basically the x axis is the progress of the reaction going from reactants to products the Y axis is the enthalpy, depending on whether it is an endothermic or expthermic reaction the chemicla reactants start at either high (for exothermic) or low (for endothermic). exothermic start high as you might say the reactants hold alot of energy hence why when the reaction takes place they release the energy. The fact that they release the energy means that when the reaction is finished the products will have lower enthalpy in an exothermic reaction as some energy is lost as heat along the waythe graph physically looks like this:http://www.avogadro.co.uk/h_and_s/bondenthalpy/hdiagrams.gif but you need an understanding of it to draw your own
/\/\/\/
mX+4# n4 k4u?
Any catalyst will make a chemical reaction easier or quicker to happen by lowering the activation energy. On a energy diagram, you will see a lower "hill" for activation energy, which corresponds to less energy required to begin the reaction.