A Chemical Chain Reaction Requires Which of the Following Conditions

Continuous-wave output powers of 22 MW at 27 μm HF and 38 μm DF have been produced in this way. Proper conditions for a chain reaction depend not only on various external factors such as temperature but also on the quantity and shape of the substance undergoing the reaction.

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Initiation requires an input of energy but after that the reaction is self-sustaining.

. 38In flaming combustion the fire will continue to burn until the fuel or oxygen is exhausted or. 1 Initiation in which a reactive intermediate which may be an atom an ion or a neutral molecular fragment is formed usually through the action of an agent such as light heat or a catalyst. Chemical change leads to formation of new substance hence a chemical reaction occur between the reactants.

The answer to this question is the need to overcome the activation energy of the reaction which means that it requires energy at first to jump start the process. In order to achieve an uncontrolled chain reaction a nuclear weapon uses a _____ of fissionable material. Or there is an exothermic reaction which means that heat is released in the chemical reaction.

Initiation propagation and termination. This is a chemical chain reaction. A classical example is the reaction of hydrogen with oxygen.

Same require high pressure for eg. The reaction proceeds through the radical chain mechanism which is characterized by three steps. PCR is based on using the ability of DNA polymerase to synthesize new strand of DNA complementary to the offered template strand.

The inherent self-acceleration may or may not outrun termination. Polymerase Chain Reaction PCR Introduction PCR Polymerase Chain Reaction is a revolutionary method developed by Kary Mullis in the 1980s. Because DNA polymerase can add a nucleotide only onto a preexisting 3-OH group it.

It can be started by light an electric spark bombardment with neutrons etc. Bmore than 72 hours have passed. If it does a detonation results.

CAS ΔΗΙΤ D. A Fast moving neutrons B More neutrons should be released in the fission process than is required to induce fission. A chemical chain reaction proceeds by a sequence generally subdivided into three stages.

Most chemical chain reactions have very reactive intermediates called free radicals. Any sequence of events each of which results in. Cthe chemical chain reaction causes molecules of methane and oxygen to break apart.

Which of the following conditions is not necessary for a sustained chain reaction. 106 Asurface combustion takes over. Gas molecule to decrease the distance of molecular interaction between them.

The molecules must collide in a way that the. Which of the following conditions is not necessary for a sustained chain reaction. The intermediate that maintains the chain reaction is called a chain carrier.

Chemical bonding and molecular structure 346 Chemical thermodynamics 367 Solutions 197 Equilibrium 243 Redox reactions and electrochemistry 194 Chemical kinetics 230 Surface chemistry 97 Classification of elements and periodicity in properties 89 General principles and process of Isolation of metals 62 Hydrogen 76. Heat flows in chemical reactions mean that you can either have an endothermic reaction which means that you continuously have to supply energy for the reaction to take place because the energy of the products is higher than the energy of the reactants. Dissolving salt in water requires a chemical reaction to break apart sodium chloride into its elements.

Which of the following reactions requires the presence of oxygen. C Moderators to slow down neutrons. The exothermic chain reaction between H 2 and F 2 to yield vibrationally excited HF is the basis for an efficient chemical laser requiring little input of electrical power.

ΔΗ 0 E. Which of the following conditions will ensure that a chemical reaction will definitely proceed in the forward direction toward products. There will always be molecules in a lower energy state coming out of these reactions.

In your car the distributor and battery provide this starting energy by creating an electrical spark. Certain chain reactions involve steps which generate more free radicals than they consume. Polymerization reactions are chain reactions and the formation of Teflon.

In a chain reaction positive feedback leads to a self-amplifying chain of events. Fission chain reactions occur because of interactions between neutrons and fissile isotopes such as 235 U. Chain reactions are one way that systems which are not in thermodynamic equilibrium can release energy or increase entropy in order to reach a state of higher entropy.

A chain reaction is a sequence of reactions where a reactive product or by-product causes additional reactions to take place. Sometimes called molecular photocopying the polymerase chain reaction PCR is a fast and inexpensive technique used to amplify - copy - small segments of DNA. Because significant amounts of a sample of DNA are necessary for molecular and genetic analyses studies of isolated pieces of DNA are nearly impossible without PCR amplification.

The energy released from one hydrocarbon undergoing combustion will lead to another molecule undergoing the same chemical reaction. This is called chain branching. A self-sustaining series of chemical or nuclear reactions in which the products of the reaction contribute directly to the process.

Chain reactions generally involve three distinct processes. Two conditions that must met for a chemical reaction to occur are the molecules must collide and they must have enough energy to be able to react. Other sources of initial energy can come from the Sun matches friction etc.

An initiation step that begins the reaction a series of chain-propagation steps and eventually a termination step. Hence the reacting substance should be in contact for collection to occur. Which of the following conditions will ensure that a chemical reaction will definitely proceed in the forward direction toward products.

These atoms or fragments are usually derived from stable molecules due to photo- or heat-dissociation. BIt cannot be extinguished by chemical flame inhibition. Chain reaction may be inhibited by agents acting as free-radical traps.

Technology like heat engines has been developed to get energy out of chemical reactions in this way. The chain reaction requires both the release of neutrons from fissile isotopes undergoing nuclear fission and the subsequent absorption of. A chain reaction can be of various types but nuclear chain reactions are the best known.

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