Changing Exothermic Amounts in a Reaction

Name: Mike
Status: student
Grade: 9-12
Location: CA

Question: Can we change the amount of energy in an exothermic reaction?
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There are a number of ways to change the energy (either exo- or endo-) 
The relative amounts of reactants can be changed, the temperature can be 
increased (or decreased). In some cases the pressure can be changed (or 
not changed). One or more of the reactants and/or products can be utilized 
in a different physical state (solid, liquid, gas, solution, etc.). So 
there are a lot of "handles" for altering the amount of heat absorbed or 
given off in a chemical reaction.

Vince Calder
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