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Compared to the energy it takes to separate oxygen and hydrogen from water, the amount of energy given off when they recombine is
Catalyst
A substance that increases the rate of a chemical reaction without being consumed or permanently altered in the process.
Equilibrium Constant
A numerical value that expresses the ratio of concentrations of products to reactants at equilibrium for a reversible chemical reaction at a constant temperature.
Reactants
Substances initially present in a chemical reaction that are consumed during the reaction to make products.
Products
Substances that are formed as a result of a chemical reaction, found on the right side of a chemical equation.
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