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A substance that has weight and occupies space is called
a. kinetic energy.
b. a catalyst.
c. matter.
d. potential energy.
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- Which statement is true regarding the function of a catalyst in a chemical reaction? a) A catalyst increases the rate of a reaction. b) A catalyst provides an alternate mechanism for the reaction. c) A catalyst is not consumed by the reaction. d) All of the above are true.What law of chemistry determines how much energy can be transferred when it is converted from one form to another? a. the first law of thermodynamics b. the second law of thermodynamics c. the conservation of matter d. the conservation of energyWhich two of the following apply to the products of an exergonic reaction? A. Have less energy than the reactants B. Are less ordered than the reactants C. Are more ordered than the reactants D. Have more energy than the reactants
- Enzymes are organic catalysts that (a) alter the direction in which a chemical reaction proceeds, (b) determine the nature of the products of a reaction, (c) increase the speed of a chemical reaction, (d) are essential raw materials for a chemical reaction that are converted into some of its products.A chemical reaction is more likely to occur spontaneously if A. the products of the reaction are more complex than the reactants. B. the system takes up heat from its surroundings. C. the products of the reaction are more disordered than the reactants. D. the system gains free energy.Beginning physics students are often taught the basic concepts of thermodynamics with two phrases: First, you can never win. Second, you can never break even. Explain.
- Which of the following is not true about enzymes? a. They are consumed by the reactions they catalyze. b. They are usually made of amino acids. c. They lower the activation energy of chemical reactions. d. Each one is specific to the particular substrate(s) to which it binds.What is activation energy? a. The thermal energy associated with random movements of molecules b. The energy released through breaking chemical bonds c. The difference in free energy between reactants and products d. The energy required to initiate a chemical reactionAn enzyme accelerates chemical reactions by all of the following, EXCEPT: a) Bringing reactants close together b) Shifting equilibrium to favor the products c) Adding temporary charges to substrates d) Orienting chemical bonds for best reactivity e) Straining chemical bonds that will be broken
- What is the most common form of kinetic energy that is released from chemical energy in chemical reactions? A) Sound B) Electromagnetic radiation C) Electricity D) Light E) ThermalEnzymes catalyze a chemical reaction by A. decreasing the amount of ATP required to activate a reaction B. increasing the amount of ATP required to activate a reaction C. slowing down the reaction to obtain more products D. increasing the reaction to obtain more products E. decreasing the amount of ATP required and obtaining more products.A catalyst does not alter the difference in the energy contents of the reactants and products. True or false?
