Reactivity refers to the rate at which a chemical substance tends to undergo a chemical reaction in time. The reaction rate or rate of reaction for a Reactant or product in a particular reaction is intuitively defined as how fast a reaction takes A chemical substance is a Material with a definite chemical composition. A chemical reaction is a process that always results in the interconversion of Chemical substances The substance or substances initially involved in a chemical reaction are called In pure compounds, reactivity is regulated by the physical properties of the sample. A chemical compound is a substance consisting of two or more different elements chemically bonded together in a fixed proportion by Mass. For instance, grinding a sample to a higher specific surface area increases its reactivity. In impure compounds, the reactivity is also affected by the inclusion of contaminants. In crystalline compounds, the crystalline form can also affect reactivity. In Materials science, a crystal is a Solid in which the constituent Atoms Molecules or Ions are packed in a regularly ordered repeating However in all cases, reactivity is primarily due to the sub-atomic properties of the compound.
Causes of reactivity
In general, any time a chemical reaction occurs it is due to the chemical being able to enter a more stable state. A chemical reaction is a process that always results in the interconversion of Chemical substances The substance or substances initially involved in a chemical reaction are called Quantum chemistry provides the most in depth and exact understanding of the reason this occurs. Quantum chemistry is a branch of Theoretical chemistry, which applies Quantum mechanics and Quantum field theory to address issues and problems in Electrons exist in orbitals that are the result of solving the Schrödinger equation for specific situations. The electron is a fundamental Subatomic particle that was identified and assigned the negative charge in 1897 by J In Chemistry, a molecular orbital (or MO) is a region in which an Electron may be found in a Molecule. In Physics, especially Quantum mechanics, the Schrödinger equation is an equation that describes how the Quantum state of a Physical system
All things (values of the n and ml quantum numbers) being equal, the order of stability of electrons in a system from least to greatest is unpaired with no other electrons in similar orbitals, unpaired with all degenerate orbitals half filled and the most stable is a filled set of orbitals. Quantum numbers describe values of conserved numbers in the dynamics of the Quantum system. In order to achieve one of these orders of stability, an atom will react with another atom, thereby stabilizing both atoms. For example, a lone hydrogen atom has a single electron in its 1s orbital. Hydrogen (ˈhaɪdrədʒən is the Chemical element with Atomic number 1 It becomes significantly more stable (as much as 100 kilocalories per mole, or 420 kilojoules per mole) when reacting to form H2. This article is about the unit of energy For its use in Nutrition and Food labelling regulations, see the article on Food energy. The mole (symbol mol) is a unit of Amount of substance: it is an SI base unit, and almost the only unit to be used to measure this The joule (written in lower case ˈdʒuːl or /ˈdʒaʊl/ (symbol J) is the SI unit of Energy measuring heat, Electricity
It is for this same reason that carbon will almost always form four bonds. Carbon (kɑɹbən is a Chemical element with the symbol C and its Atomic number is 6 A chemical bond is the physical process responsible for the attractive interactions between Atoms and Molecules and which confers stability to diatomic and polyatomic Its ground state valence configuration is 2s2 2p2, half filled. In Chemistry, valence, also known as valency or valency number, is a measure of the number of Chemical bonds formed by the Atoms However, the activation energy to go from half filled to fully filled p orbitals is so small it is negligible, and as such carbon will form them almost instantaneously, meanwhile the process releases a significant amount of energy (exothermic). In Chemistry, activation energy, also called midnight energy, is a term introduced in 1889 by the Swedish scientist Svante Arrhenius, that is defined In Thermodynamics, the word exothermic "outside heating" describes a process or reaction that releases Energy usually in the form of Heat, but This four equal bond configuration is called sp3 hybridization. -->In Chemistry
Chemical kinetics and reactivity
The rate of any given reaction,
Reactants → Products
is governed by the rate law:
Rate = k * [A]
where the rate is the change in the molar concentration in one second in the rate-determining step of the reaction (the slowest step), [A] is the product of the molar concentration of all the reactants raised to the correct order, known as the reaction order, and k is the reaction constant, which is constant for one given set of circumstances (generally temperature and pressure) and independent of concentration. The rate law or rate equation for a Chemical reaction is an equation which links the Reaction rate with concentrations or pressures of reactants and constant The reaction rate or rate of reaction for a Reactant or product in a particular reaction is intuitively defined as how fast a reaction takes The greater the reactivity of a compound the higher the value of k and the higher the rate. For instance, if,
A+B → C+D
Then:
Rate = k * [A]n * [B]m
where n is the reaction order of A, m is the reaction order of B, n+m is the reaction order of the full reaction, and k is the reaction constant.
See also
Catalysis is the process in which the rate of a Chemical reaction is increased by means of a Chemical substance known as a catalyst In Chemistry, the reactivity series is a series of Metals in order of reactivity from highest to lowest Organic chemistry is a discipline within Chemistry which involves the scientific study of the structure properties composition reactions, and preparation Chemical kinetics, also known as reaction kinetics is the study of rates of chemical processesDictionary
reactivity
-noun
- responsiveness to stimulation
- (chemistry) relative susceptibility to chemical reaction
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