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What is the substance that helps a reaction but isn't chemically changed?
Wiki User
∙ 6y ago
These substances are called catalysts.
Wiki User
∙ 6y ago
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What describes a catalyst?
A character who makes events happen.
What is a chemical substance that helps control reactions?
A catalyst is generic term used to influence rates of reaction. The catalyst lowers the activation energy required to start the reaction. In biology, catalysts are called enzymes.
How does activation energy determine if a reaction will release or absorb energy?
Activation energy is really just the minimum amount of energy needed for a chemical reaction to occur. Without it, the energy will stay the same and the substance cannot undergo a chemical change. The thing to look at, I think, is the product of the reaction. For example, in a graph, two substances could have the same activation energy, but after the reaction the amount of energy in substance 1 could be extremely low and the amount of energy in substance 2 could be higher than the activation energy. In substance 1, evidence of an EXOTHERMIC reaction has occurred because the amount of energy in the original substance was lost indicating that it has released energy. Whereas in substance 2, when the amount of energy was higher than the activation energy, it is evident that an ENDOTHERMIC reaction has occurred because the amount of energy after the reaction is higher than it was before the reaction. This shows that substance 2 absorbedenergy making it endothermic. hope this helps!
An example sentence with catalyst in it?
A catalyst is a substance that helps a chemical reaction happen faster without suffering any change. An example sentence is: Because of the catalyst, the project ending early.
What is heat During the endothermic reaction?
The heat spreads to the colder substance until the two are at an equillibrium (the two objects at the end will have the same temperature)
What is a substance which helps make a chemical change happen but is not changed itself in the process is called?
Catalyst: a substance which speeds up a chemical change or enables the change to take place at a lower tempature, and is not changed or used up in the reaction.
What substance helps speed up a reaction in turtles body?
enzymes
What is a substance that helps chemical reactions?
A substance that helps chemical reactions is called a catalyst. It speeds up the rate of a reaction by providing an alternative pathway with lower activation energy. Catalysts are not consumed in the reaction and can be used repeatedly.
A substance which helps make a chemical change happen but is not changed itself in the process is called an?
The answer is catalyst
What is a pure substances and how does it relate to elaments and compounds?
a pure substance is something that hasn't been chemically combined with another substance and this relates to elements and compounds because on the periodic table the compounds are chemically mixed. hope this helps you by the way you didn't wwrite elements the correct way, you spelt it elaments!
A substance which helps a reaction to take place but that does not take an active part is a?
A substance which helps with chemical reactions, by making them possible at all, or reducing the effort required, is a catalyst.
What describes a catalyst?
A character who makes events happen.
What is another name for a pure substance?
The terms element and compound are used to identify pure substances.
What is a chemical substance that helps control reactions?
A catalyst is generic term used to influence rates of reaction. The catalyst lowers the activation energy required to start the reaction. In biology, catalysts are called enzymes.
What in the mouth helps you to chemically digest food?
Saliva
What in the mouth helps chemically digest food?
saliva
How does activation energy determine if a reaction will release or absorb energy?
Activation energy is really just the minimum amount of energy needed for a chemical reaction to occur. Without it, the energy will stay the same and the substance cannot undergo a chemical change. The thing to look at, I think, is the product of the reaction. For example, in a graph, two substances could have the same activation energy, but after the reaction the amount of energy in substance 1 could be extremely low and the amount of energy in substance 2 could be higher than the activation energy. In substance 1, evidence of an EXOTHERMIC reaction has occurred because the amount of energy in the original substance was lost indicating that it has released energy. Whereas in substance 2, when the amount of energy was higher than the activation energy, it is evident that an ENDOTHERMIC reaction has occurred because the amount of energy after the reaction is higher than it was before the reaction. This shows that substance 2 absorbedenergy making it endothermic. hope this helps!
