What does the G in reaction I represent?
The (aq) sign stands for aqueous in water and means the compound is dissolved in water. Finally, the (g) sign means that the compound is a gas. Coefficients are used in all chemical equations to show the relative amounts of each substance present.
What does the subscript represent?
Chemical formulas use letters and numbers to represent chemical species (i.e., compounds, ions). The numbers appearing as subscripts in the chemical formula indicate the number of atoms of the element immediately before the subscript. If no subscript appears, one atom of that element is present.
What are the substances the reaction starts with called Where is it written?
The reactants (the starting substances) are written on the left, and the products (the substances found in the chemical reaction) are written on the right. The coefficients next to the symbols of entities indicate the number of moles of a substance produced or used in the chemical reaction.
Which step is the rate determining step?
A reaction intermediate is a chemical species that is formed in one elementary step and consumed in a subsequent step. The slowest step in a reaction mechanism is known as the rate-determining step.
Does the reaction occur in a single step?
The stepwise changes are collectively called the reaction mechanism. For this reaction to occur in a single step, 25 dioxygen molecules and 2 isooctane molecules would have to collide simultaneously and be converted to 34 molecules of product, which is very unlikely.
What is the name given to the slowest step in a reaction mechanism?
Key points. A reaction mechanism is the sequence of elementary steps by which a chemical reaction occurs. A reaction that occurs in two or more elementary steps is called a multistep or complex reaction. The slowest step in a reaction mechanism is known as the rate-determining step.
What is zeroth order reaction?
: a chemical reaction in which the rate of reaction is constant and independent of the concentration of the reacting substances — compare order of a reaction.
What is an example of a second-order reaction?
A second kind of second-order reaction has a reaction rate that is proportional to the product of the concentrations of two reactants. An example of the former is a dimerization reaction, in which two smaller molecules, each called a monomer, combine to form a larger molecule (a dimer).
What does zero first and second-order mean?
A zero-order reaction proceeds at a constant rate. A first-order reaction rate depends on the concentration of one of the reactants. A second-order reaction rate is proportional to the square of the concentration of a reactant or the product of the concentration of two reactants.