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Which Photochemical reactions proceed only under the influence of light are called?
Photochemical reactions that only proceed under the influence of light are called photoreactions. This type of reaction involves the absorption of photons to initiate a chemical reaction. The rate and efficiency of photoreactions are typically dependent on the intensity and wavelength of light.
What do you mean by photochemical reaction?
A primary photochemical reaction is the immediate consequence of the absorption of light. Subsequent chemical changes are called secondary processes. http://edelsteincenter.files.wordpress.com/2010/07/photochemistry.pdf
Which of the following photosynthetic reactions describe the reactions in which photolysis occurs?
Photolysis occurs in the light-dependent reactions of photosynthesis. These reactions include the light absorption by chlorophyll, splitting of water into oxygen and protons, and the generation of ATP and NADPH.
Is rusting of iron is photochemical process?
No, rusting of iron is not a photochemical process. Rusting is a chemical reaction that occurs in the presence of moisture and oxygen, leading to the formation of iron oxide. Photochemical processes involve light as a driving force for chemical reactions.
Is activation energy for thermal and photochemical reactions same?
The definition of the activation energy is exactly the same -- the thermodynamic energy barrier that the reactant must pass over to convert to products. The difference between a thermal and a photochemical reaction is only where the reactants get the energy to get over this barrier. In a thermal reaction, that energy is given by the temperature, and is carried in excited rotational modes, higher kinetic energies and if hot enough, excited vibrational states. In a photochemical reaction, the activation energy is provided by photons, usually in the form of electronic excited states, but could also be vibrational or rotational. The concept of the activation barrier is identical in both cases.
Which Photochemical reactions proceed only under the influence of light are called?
Photochemical reactions that only proceed under the influence of light are called photoreactions. This type of reaction involves the absorption of photons to initiate a chemical reaction. The rate and efficiency of photoreactions are typically dependent on the intensity and wavelength of light.
What do you mean by photochemical reaction?
A primary photochemical reaction is the immediate consequence of the absorption of light. Subsequent chemical changes are called secondary processes. http://edelsteincenter.files.wordpress.com/2010/07/photochemistry.pdf
Can light cause changes to the metal?
Yes, light can cause changes to metal through processes like oxidation or photochemical reactions.
Which of the following photosynthetic reactions describe the reactions in which photolysis occurs?
Photolysis occurs in the light-dependent reactions of photosynthesis. These reactions include the light absorption by chlorophyll, splitting of water into oxygen and protons, and the generation of ATP and NADPH.
Is the Ability to react with light - chemical or physical?
The ability to react with light is a physical process known as photochemical reactions. In these reactions, molecules absorb light energy, which excites the molecules and leads to a chemical transformation.
What is the statement of Stark-Einstein's law of photochemical equivalence?
Stark-Einstein's law of photochemical equivalence states that each photon absorbed or emitted in a photochemical reaction is associated with the activation of one molecule. This law helps to explain the relationship between light energy and the number of molecules undergoing photochemical reactions.
What is an example of light and electricity bringing chemical reactions?
Photosynthesis is a photochemical reaction.Sodium chloride electrolysis is an electrochemical reaction.
Is rusting of iron is photochemical process?
No, rusting of iron is not a photochemical process. Rusting is a chemical reaction that occurs in the presence of moisture and oxygen, leading to the formation of iron oxide. Photochemical processes involve light as a driving force for chemical reactions.
How do singlet and triplet states play a role in photochemistry processes?
Singlet and triplet states are different energy levels that molecules can be in during photochemical reactions. Singlet states are more common and usually lead to the desired chemical reactions, while triplet states can sometimes cause unwanted side reactions. Understanding and controlling these states is important in optimizing photochemical processes.
Is activation energy for thermal and photochemical reactions same?
The definition of the activation energy is exactly the same -- the thermodynamic energy barrier that the reactant must pass over to convert to products. The difference between a thermal and a photochemical reaction is only where the reactants get the energy to get over this barrier. In a thermal reaction, that energy is given by the temperature, and is carried in excited rotational modes, higher kinetic energies and if hot enough, excited vibrational states. In a photochemical reaction, the activation energy is provided by photons, usually in the form of electronic excited states, but could also be vibrational or rotational. The concept of the activation barrier is identical in both cases.
What is the decomposition reaction caused by light called?
The decomposition reaction caused by light is called photolysis. This process involves the breaking down of a compound into simpler substances by absorbing light energy.
Which describes the role of sunlight in chemical reactions?
Sunlight can initiate or accelerate some chemical reactions by providing the energy needed to break chemical bonds. This process is called photochemical reaction. Sunlight can also be essential in photosynthesis, where plants use it to convert carbon dioxide and water into glucose and oxygen.
