You watch water falling from the top of a waterfall to the bottom. How would you characterize this physical phenomenon in terms of spontaneity? What if you wanted to move the water from the bottom of the falls to the topâ€”how would you characterize that reaction?
Consider the following reaction occurring in a closed chemical system. Assume that this reaction is at equilibrium and that in general the reaction to the right is favored.
CH3CH2OH + 3O2 â‡„ 2CO2 + 3H2O âˆ†H = â€“1,235 kJ/mol
- What type of chemical reaction is this?
- If more CH3CH2OH is added to the system, how will the reactions shift to reach equilibrium again?
- If water is extracted from the system, how will the reactions shift to reach equilibrium again?
- If heat is removed from the system, how will the reactions shift to reach equilibrium again?
- What is the name of the principle that helps you predict each of these shifts in equilibrium
This graph shows the energy involved in a reaction involving two molecules. Describe what is happening or what the state of the reaction is at A, B, C, and D. Then tell if this is an exothermic or an endothermic reaction.
**Graph is located in the PDF
Chalcocite is an ore from which copper can be extracted for commercial use. The formula for this important ore is Cu2S. In the laboratory it is formed by the following reaction:
2Cu + S â†’ Cu2S
The reaction takes place in laboratory conditions that allow the reactant atoms to move freely about in the reaction vessel. Explain this reaction in terms of collision theory.