rate of reaction

rate of reaction

[′rāt əv rē′ak·shən]
(chemistry)
A measurement based on the mass of reactant consumed in a chemical reaction during a given period of time.
References in periodicals archive ?
The rate of reaction in terms of quantum yield was determined by passing monochromatic light of 657 nm through the reaction mixture and the photo cell responses were recorded.
Amir Abdou, a Grade 12 student at the Jumeirah English Speaking School, said his idea includes producing oxygen in a non-conventional way, such as using the decomposition of hydrogen peroxide and examining its rate of reaction in microgravity compared to Earth's gravity.
This is primarily possible because of knowledge that the rate of reaction doubles for every 10[degrees]C increase in temperature.
Key statement: The present invention provides a rubber composition for a tire, which has an increased rate of reaction between a silane coupling agent and silica so that its performances including fuel economy and abrasion resistance can be enhanced; and a pneumatic tire formed from the rubber composition.
For instance, the small volume flow reactors are much easier to pressurize than larger batch set-ups, enabling elevated solvent boiling points and higher reaction temperatures, therefore increasing the rate of reaction. In addition, the fact that only a small volume of reagents is reacting at any one time makes the whole process a lot safer, particularly when working with hazardous or highly exothermic reactions.
At this point, the process is reaction controlled: the diffusion of BPA to the interface is very fast, but the rate of reaction limits the obtainable molecular weight.
where r is the rate of reaction, [DELTA][H.sup.o.sub.a] is the enthalpy of activation at standard condition, [DELTA][S.sup.o.sub.a] is the entropy of activation at standard condition, h is Planck's constant, and N is the Avogadro number.
The rate of reaction was monitored at constant temperatures by Thermostatic Water Bath Tank of Model HH-4.
It can be seen that the rate of reaction depends significantly on the ratio of the rate constants [k.sub.21] and [k.sub.43], which describe de-isomerization of (RA) and (RB).
The measurement method reported here is able to provide insights upon the kinetic behavior of the test lubricants though comparisons of the rate of reaction as a function of temperature and time.
This research is based on two principles: (i) the chymotrypsin hydrolysis of gelatin from a different source could produce peptides of varying properties that will yield a different degree of browning during Maillard reaction and (ii) the introduction of [Cu.sup.2+] will expedite the rate of reaction and reduce the time for brown colour development.