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chapter2chemistry

QuestionAnswer
a process that changes one set of chemicals into another chemical reactions
elements or compounds that enter into a chemical reaction reactants
elements or compounds that are produced from a chemical reaction products
always involve changesin the chemical bonds that join atoms in compounds chemical reactions
the energy needed to get a chemical reaction started activation energy
a substance that speeds up the rate of a chemical reaction catalyst
proteins that act as biological catalysts enzymes
substrates bind to a specific location on the enzyme known as the active site
changes in pH or temperature can cause changes in? an enzymes shape that can reduce its effectiveness as a catalyst
if the reactants have more energy than the products then energy is? released...known as an exothermic reaction
if the reactants have less energy than the products then energy is? absorbed...known as an endothermic reaction
depending on the number and types of chemical bonds broken and formed, energy may be either _____ or _____ by chemical reactions released or absorbed.
chemical reactions that release energy... often occur spontaneously
chemical reactions that absorb energy... will not occur without a source of energy
in ______ reactions, one direction will produce energy, and the other will require energy reversible
a catalyst speeds up the rate of a chemical reaction by... lowering a reactions activation energy
_____ speed up chemical reactions that take place in cells enzymes
without enzymes, the thousands of chemical reactions necessary to sustain life would simply be...? to slow
Created by: ambcar22
 

 



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