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Are correct statements about reactions Check all that apply. A. Some reactions can occur more slowly than others. B. A catalyst could decrease the activation energy of a reaction. C. During a reac?
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Does a catalyst decrease or increase the activation energy required?
The catalyst decrease the needed activation energy.
Is catalyst is specific for each reaction?
Catalysts speed up reactions and they do this by decreasing the activation energy. The way they decrease the activation energy is by providing an alternate pathway for the reaction. Because there are so many different reaction mechanisms/pathways in chemistry, there must be many different catalysts.
How does catalyst affect the activation energy of chemical reaction?
The presence of a catalyst affects the activation energy of a reaction by lowering the activation energy, helping the reaction go faster and making it so the reaction does not have to use as much energy to fulfill the products.
What will change when a catalyst is added to a chemical reaction?
A catalyst speeds up the rate of reaction, and lower the activation energy needed.
When you Reduce activation energy what happens?
Reducing activation energy allows chemical reactions in the cells of living things to occur at temperatures at which the cells can survive. Reducing activation energy is carried out by enzyme catalysts. The enzyme catalysts are not used up in the reaction, and can be used in subsequent chemical reactions.
Does a catalyst decrease or increase the activation energy required?
The catalyst decrease the needed activation energy.
What can decrease the activation energy needed to start a rection?
A Catalyst
Is catalyst is specific for each reaction?
Catalysts speed up reactions and they do this by decreasing the activation energy. The way they decrease the activation energy is by providing an alternate pathway for the reaction. Because there are so many different reaction mechanisms/pathways in chemistry, there must be many different catalysts.
How does catalyst affect the activation energy of chemical reaction?
The presence of a catalyst affects the activation energy of a reaction by lowering the activation energy, helping the reaction go faster and making it so the reaction does not have to use as much energy to fulfill the products.
What effect does an enzyme have on a activation energy needed to start a reaction?
In chemistry it is called a catalyst. Enzymes decrease the activation energy needed to start a reaction.
What will change when a catalyst is added to a chemical reaction?
A catalyst speeds up the rate of reaction, and lower the activation energy needed.
What is the difference between positive catalyst and negative catalyst?
The substances which increase the rate of a chemical reaction are called a Positive Catalyst whereas The substances which decrease the rate of a chemical reaction are called Negative Catalyst. Positive Catalyst decreases the Activation energy of reactant molecules whereas negative catalyst increases the Activation energy of the reactant molecules. Positive Catalyst is also called the Promoter whereas negative catalyst is also called Inhibitor.
How does activation energy affect chemical reactions?
The Arrhenius equation is: Ea = -RT ln(k/A) where Ea - activation energy R - universal gas constant ln - logarithm k - speed constant T - temperature in kelvins
When you Reduce activation energy what happens?
Reducing activation energy allows chemical reactions in the cells of living things to occur at temperatures at which the cells can survive. Reducing activation energy is carried out by enzyme catalysts. The enzyme catalysts are not used up in the reaction, and can be used in subsequent chemical reactions.
Why use reactant in the powdered form?
A lump of solid has a much lower surface area compared to a powdered catalyst. Since most chemical reactions that are catalysed by solid phase catalysts (heterogeneous catalysts) occur on the catalyst surface more surface area = faster reaction.
Why does a catalyst speed up the rate of reaction?
The use of a catalyst increases the chance of particles meeting. This causes there to be a decrease in activation energy, and results in an increase in rate of reaction.
What is the importance of enzymes to biological systems?
Enzymes decrease the amount of activation energy required for chemical reactions to occur.
