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According to the second law of thermodynamics it is not possible to change heat completely into work with no other change taking place?
The second law of thermodynamics states that not all heat energy can be converted into work. Some heat will always be lost in the form of waste heat during energy conversion processes. This law is a fundamental principle that governs the efficiency of energy conversion systems.
Action reaction forces always act on the same objects True or false?
False. Action-reaction forces always act on different objects. When one object exerts a force on another object, the second object exerts an equal and opposite force back on the first object.
Is the first law of thermodynamics states that energy can be transformed in different ways but can never be created or destroyed. A.True?
True. The first law of thermodynamics, also known as the law of conservation of energy, states that energy cannot be created or destroyed, only transferred or converted from one form to another.
Mass and air resistance affect the gravitational attraction between objects true or false?
This is false. The answer is that mass and distance affect the gravitational attraction between objects. Air resistance has no effect on this.
Is the making of ice cubes an exothermic reaction?
exothermic. the energy flows out. exothermic. the energy flows out.
Can an enzyme make an endothermic reaction exothermic?
False. Not necessarily. Do not confuse kinetics with thermodynamics. Although an enzyme as a catalyst decreases the activation energy of the reaction, this says nothing about whether the reaction is ultimately endothermic or exothermic.
Do enzymes raise the energy of activation required to initiate a reaction?
false
When an enzyme binds with its substrate the activation energy needed for the chemical reaction to occur is increased True or False?
False. When an enzyme binds with its substrate, the activation energy needed for the chemical reaction is decreased, not increased. This reduction in activation energy allows the reaction to occur more quickly and at lower temperatures, making it easier for the reaction to proceed.
IS it true that enzymes increase the number of collisions in a chemical reaction?
Enzymes do not increase the number of collisions in a chemical reaction. Instead, they lower the activation energy required for a reaction to occur, thereby increasing the rate of the reaction. This is achieved by providing an alternative pathway for the reaction to proceed.
True or False Enzymes are inorganic catalysts?
False. The activation energy of the reaction remains the same. Enzymes split up the reaction pathway into fewer steps, so that less activation energy is required at each step. This allows each step to occur at a lower temperature, or more quickly at the same temperature.
Enzymes are carbohydrates that act as catalysts in metabolic reactions true or false?
FALSE!Enzymes are PROTEINS that can act as catalysts in metabolic reactions.
Is it true that Enzymes are not consumed during a chemical reaction?
Correct. Enzymes help to speed up chemical reactions. They may speed them up, costing them some energy, but they are never used up.
What proteins act as catalysts in mediating and speeding specific chemical reactions?
Enzymes are proteins that act as catalysts in mediating and speeding specific chemical reactions in biological systems. They lower the activation energy required for a reaction to occur, making the reaction proceed faster. Enzymes are highly specific, each one catalyzing a particular reaction or a group of related reactions.
Do enzymes work by providing energy to initiate reaction?
No they do not supply energy to start a chemical reaction, however energy has something to do with it. Enzymes actually lower energy barriers, in other words it reduces the activation energy needed which is the energy absorbed before the chemical reaction can start.
Is it true that after the product of an enzyme-catalyzed reaction leavesthe active site the enzyme can no longer react with more substrate?
No, after the product of an enzyme-catalyzed reaction leaves the active site, the enzyme can still react with more substrate to continue catalyzing the reaction. The enzyme is not altered or used up in the reaction, so it can continue to bind to and catalyze additional substrate molecules.
Enzymes tend to raise the activation energy?
Enzymes lower the activation energy required for a chemical reaction to occur, allowing reactions to happen more efficiently at lower temperatures in biological systems. This reduction in activation energy enables faster reaction rates and promotes metabolic processes in living organisms.
Catalyst are always enzyme it's true or false?
False . Catalysts can be many things ; enzymes and transition elements and their compounds , for example .So Enzymes are always catalysts but Catalysts are NOT always enzymes .
