Heat is required for many vital chemical processes. Too cold and nothing happens, too hot and the enzymes in the body become denatured (useless)
Nothing to explain; that is the way EXO- and ENDOthemic reactions are called by definition
It is a physical change because it is evaporation. Physical changes can be undone. If it was a chemical reaction it would be permanent like burning wood.
Difficult to explain in some words: see the link below.
Is burning a phase change. Explain? Ans: No because, its a chemical reaction
In chemical weathering, there is a chemical reaction that causes weathering. Mechanical weathering is caused by fire, abrasions of water along a surface, animals, or freezing and thawing.
A chemical equation lets humans explain a chemical reaction. When the same reaction occurs repeatedly, the equation serves to remind us of what happened in the reaction.
The role of a catalyst is to quicken the chemical reaction . On reacting, it subsequently appears as a product in the next step of the reaction.
A chemical equation lets humans explain a chemical reaction. When the same reaction occurs repeatedly, the equation serves to remind us of what happened in the reaction.
neutrallization is a chemical reaction of acid and alkali
a chemical change is a change which brings about a change in the chemical properties of a substance which cannot be reversed through physical means like heating or cooling.
Nothing to explain; that is the way EXO- and ENDOthemic reactions are called by definition
Burning is an oxydation reaction so a chemical change.
Burning methane is a chemical reaction, because you are reacting it with oxygen. Work on your spelling as well.
This is considered to be a chemical reaction because it is not possible to rearrange water and oxygen to form hydrogen peroxide. This is science studied.
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It is a physical change because it is evaporation. Physical changes can be undone. If it was a chemical reaction it would be permanent like burning wood.
Difficult to explain in some words: see the link below.