Catalysts affect a chemical reaction by lowering the activation energy required for the reaction to occur. Activation energy is the energy required to initiate a reaction and without a catalyst, it is often high. When a catalyst is present, it provides an alternative pathway with a lower activation energy, allowing the reaction to proceed more easily and quickly.
Therefore, catalysts do not provide activation energy themselves, nor do they lose or increase it. Their role is to lower the activation energy barrier, facilitating the chemical reaction.
How do catalysts affect a chemical reaction?
lower activation energy
provide activation energy
lose activation energy
increase activation energy
3 answers
What happens during rusting of an iron nail?
Iron and sulfur combine to form iron sulfide
sulfur and oxygen combine to form a sulfur dioxide coating
sulfur iron and oxygen combine to form iron sulfoxide
iron and oxygen combine to form iron oxide.
Iron and sulfur combine to form iron sulfide
sulfur and oxygen combine to form a sulfur dioxide coating
sulfur iron and oxygen combine to form iron sulfoxide
iron and oxygen combine to form iron oxide.
During the rusting of an iron nail, iron and oxygen combine to form iron oxide. This process occurs when the iron in the nail reacts with oxygen in the presence of moisture or water. Rust, which is a form of iron oxide, is a reddish-brown coating that appears on the surface of the iron. Iron oxide is formed as a result of the chemical reaction between iron and oxygen in the presence of water, leading to the corrosion of the iron nail.