oxygen
These chemicals are called enzymes.
To initiate a chemical reaction an activation energy is necessary.
A catalyst
Fuels such as gasoline, diesel, natural gas, and coal release chemical energy when they undergo combustion reactions. This chemical energy is then converted into heat or mechanical energy to perform work.
Enzymes lower the activation energy needed to start a chemical reaction.
Water is not flammable because it does not contain any substances that can undergo combustion. Its molecular structure does not support the chemical reactions needed for burning.
Oxygen is not a special element 'needed' in so many reactions, though it is:quite commonquite reactivebut carbon and hydrogen are probaly more common in more reactions than oxygen is.
These chemicals are called enzymes.
To initiate a chemical reaction an activation energy is necessary.
Endothermic reactions absorb heat from the environment.
it acts as a catalyst
ENZYMES! its in my text book.
A catalyst
Fuels such as gasoline, diesel, natural gas, and coal release chemical energy when they undergo combustion reactions. This chemical energy is then converted into heat or mechanical energy to perform work.
Driving a car involves both chemical and physical reactions. The combustion of fuel in the engine is a chemical reaction that produces the energy needed to move the car, while the physical interactions between the tires and the road surface enable the car to accelerate, brake, and turn.
Enzymes are proteins that speed up chemical reactions in the body by lowering the activation energy needed for the reaction to occur.
Enzymes lower the activation energy needed to start a chemical reaction.