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Difference between homogeneous and heterogeneous catalysis?
A homogenous catalyst is in the same phase as the reactancts. A heterogenous catalyst is in a different phase to the reactants. For example, if all the starting materials in the reaction were liquids and you were using a liquid catalyst, then this would be homogenous catalysis. Other examples include the action of gaseous chlorine atoms to break down gaseous ozone in the atmosphere. In industry, heterogenous catalysts are generally used. This is often in the form of solid metals like iron and gaseous reactants. Metals are good catalysts are usually solid, so any time you use a metal catalyst you will have heterogenous catalysis as the reactants won't also be solids.
What is phase change number?
The phase change number is a dimensionless number used in heat transfer that represents the ratio of sensible heat transfer to latent heat transfer during a phase change process. It helps quantify the relative importance of sensible and latent heat transfer mechanisms.
What is the charge on the paper during the image transfer phase?
During the image transfer phase of printing, the paper is given a charge that is opposite to that of the toner particles. This helps to attract and transfer the toner from the photoconductor drum to the paper.
What is the balance equation for adipic acid by oxidative cleavage of cyclohexene?
Cyclohexene + 4 H2O2 --> (in presence of NaWO3 * 2H2O and Phase Transfer Catalyst) yeilds adipic acid and 4H2O
Why is an example of a heterogeneous catalyst?
catalysts which are in the same phase to that of reactants and products
Why isn't ammonium chloride suitable as a phase transfer catalyst?
Ammonium chloride is a ionic compound that is insoluble in orgainic substances. Since a phase transfer catalyst should be soluble in organic substances., Hence NH4Cl is not used as a phase transfer catalyst.
How Phase-transfer catalysis is a special form of heterogeneous catalysis?
In chemistry, Phase-Transfer Catalyst or PTC is a catalyst that facilitates the migration of a reactant from one phase into another phase where reaction occurs. Heterogeneous catalysis refers to the form of catalysis where the phase of the catalyst differs from that of the reactants. Phase here refers not only to solid, liquid, vs gas, but also immiscible liquids, e.g. oil and water. The great majority of practical heterogeneous catalysts are solids and the great majority of reactants are gases or liquids. Phase Transfer Catalysis (PTC) is a special form of heterogeneous catalysis and known as a practical methodology for organic synthesis. By using a phase transfer catalyst, it becomes possible to solubilize ionic reactants, which are often soluble in an aqueous phase but insoluble in an organic phase. This means PTC is an alternative solution to overcome the heterogeneity problem in a reaction in which the interaction between two substances located in different phases of a mixture is inhibited because of the inability of reagents to come together. @ Tatvachintan.com
What is the difference between a homogeneous catalyst and a heterogeneous catalyst?
The difference between a homogeneous and a heterogeneous catalyst is that in a heterogeneous catalyst, it is in a different phase from the reactants. However, in a homogeneous catalyst, it is in the same phase as the reactants.
Application of crown ethers in extraction of alkali and alkaline earth metals?
due to its behaviours of complexes crown ethers they act as strong phase transfer catalyst.
Difference between homogeneous and heterogeneous catalysis?
A homogenous catalyst is in the same phase as the reactancts. A heterogenous catalyst is in a different phase to the reactants. For example, if all the starting materials in the reaction were liquids and you were using a liquid catalyst, then this would be homogenous catalysis. Other examples include the action of gaseous chlorine atoms to break down gaseous ozone in the atmosphere. In industry, heterogenous catalysts are generally used. This is often in the form of solid metals like iron and gaseous reactants. Metals are good catalysts are usually solid, so any time you use a metal catalyst you will have heterogenous catalysis as the reactants won't also be solids.
In order to change the phase of milk what had to be removed?
The heat energy in the milk had to be removed in order to change the phase of milk.
Can PGAL be a product of photosynthesis?
According to my knowledge it is the product of only one specific phase of dark phase. It can not be sonsidered as a product of photosynthesis
What is gas stripping?
Gas stripping is a separation process where volatile contaminants are removed from a liquid stream by bubbling a stripping gas (such as air or steam) through the liquid. The contaminants transfer from the liquid phase to the gas phase, resulting in a cleaner liquid product. This technique is commonly used in wastewater treatment and volatile organic compound removal processes.
What is phase change number?
The phase change number is a dimensionless number used in heat transfer that represents the ratio of sensible heat transfer to latent heat transfer during a phase change process. It helps quantify the relative importance of sensible and latent heat transfer mechanisms.
What is the definition of homogeneous catalysis?
In homogeneous catalysis the reactants and the catalyst are dispersed in a single phase, usually liquid.
What is the charge on the paper during the image transfer phase?
During the image transfer phase of printing, the paper is given a charge that is opposite to that of the toner particles. This helps to attract and transfer the toner from the photoconductor drum to the paper.
What is the balance equation for adipic acid by oxidative cleavage of cyclohexene?
Cyclohexene + 4 H2O2 --> (in presence of NaWO3 * 2H2O and Phase Transfer Catalyst) yeilds adipic acid and 4H2O
