Stoichiometry – AP - Waukee Community School District Blogs
... ALWAYS check to make sure the equation you are working with is balanced!!! Use element tables to help. ...
... ALWAYS check to make sure the equation you are working with is balanced!!! Use element tables to help. ...
Changes in Matter: Physical and Chemical Changes
... change) occurs in a pot of boiling water, adding heat to the pot will only cause the water to boil faster, but not cook the egg any faster. This is because the boiling temperature of water will not change unless either something is added to the water Adding salt to water will increase the boiling te ...
... change) occurs in a pot of boiling water, adding heat to the pot will only cause the water to boil faster, but not cook the egg any faster. This is because the boiling temperature of water will not change unless either something is added to the water Adding salt to water will increase the boiling te ...
Electrochemistry - Menihek Home Page
... When the electrolytic solutions are connected by a salt bridge, it allows electrons from the anode to move to the cathode through the wire. The anode undergoes oxidation and produces electrons Conversely, the cathode undergoes reduction, gains electrons Ions in the electrolyte migrate towards the an ...
... When the electrolytic solutions are connected by a salt bridge, it allows electrons from the anode to move to the cathode through the wire. The anode undergoes oxidation and produces electrons Conversely, the cathode undergoes reduction, gains electrons Ions in the electrolyte migrate towards the an ...
Wittig Reaction
... easily than methanol). The vacuum is left on to dry the product as much as possible before a melting point can be taken. Once the crystals are dry enough, a yield is taken and a melting point is performed. As with any microscale experiment, a low yield can usually be explained easily. Because the q ...
... easily than methanol). The vacuum is left on to dry the product as much as possible before a melting point can be taken. Once the crystals are dry enough, a yield is taken and a melting point is performed. As with any microscale experiment, a low yield can usually be explained easily. Because the q ...
Balancing Chemical Reactions
... Things That You Can’t Do When Balancing a Chemical Reaction. One of the most common mistakes when balancing a chemical reaction is to change the subscripts on compounds instead of changing the stoichiometric coefficients. For example, in the presence of a spark, gaseous mixtures of H2 and O2 react f ...
... Things That You Can’t Do When Balancing a Chemical Reaction. One of the most common mistakes when balancing a chemical reaction is to change the subscripts on compounds instead of changing the stoichiometric coefficients. For example, in the presence of a spark, gaseous mixtures of H2 and O2 react f ...
Document
... Electrochemistry is the study of interchange of chemical and electrical energy. Oxidation/Reduction involves the exchange of electrons from one chemical species to another. Normally, this is done when the two chemicals contact each other in the activated complex (when two species bump into each othe ...
... Electrochemistry is the study of interchange of chemical and electrical energy. Oxidation/Reduction involves the exchange of electrons from one chemical species to another. Normally, this is done when the two chemicals contact each other in the activated complex (when two species bump into each othe ...
13. transition metal chemistry
... A phase is defined as a distinct form of matter with uniform properties throughout, that is separated by its surface from other forms. Catalysts can be referred to as either; Heterogeneous if the catalyst is present in the reaction in a different phase to the reactants, or Homogeneous if the catalys ...
... A phase is defined as a distinct form of matter with uniform properties throughout, that is separated by its surface from other forms. Catalysts can be referred to as either; Heterogeneous if the catalyst is present in the reaction in a different phase to the reactants, or Homogeneous if the catalys ...
Origin of Order: Emergence and Evolution of Biological Organization
... speculate of the heat death of the universe. The irreversibility of physical processes makes the entropy law probably the most important law for understanding physical processes and hierarchical systems including living organisms and even social relations and situations. The asymptotic law, or the t ...
... speculate of the heat death of the universe. The irreversibility of physical processes makes the entropy law probably the most important law for understanding physical processes and hierarchical systems including living organisms and even social relations and situations. The asymptotic law, or the t ...
Chapter 5: Thermochemistry
... Enthalpy is a measure of the total heat content of a system, and is related to both chemical potential energy and the degree to which electrons are attracted to nuclei in molecules. When electrons are strongly attracted to nuclei, there are strong bonds between atoms, molecules are relatively stable ...
... Enthalpy is a measure of the total heat content of a system, and is related to both chemical potential energy and the degree to which electrons are attracted to nuclei in molecules. When electrons are strongly attracted to nuclei, there are strong bonds between atoms, molecules are relatively stable ...
(a) From , 2012 General Chemistry I
... 3.00 atm expands from 8.00 L to 20.00 L and a final pressure of 1.20 atm by two different paths. (a) Path A is an isothermal, reversible expansion. (b) Path B has two parts. In step 1, the gas is cooled at constant volume until its pressure has fallen to 1.20 atm. In step 2, it is heated and allowed ...
... 3.00 atm expands from 8.00 L to 20.00 L and a final pressure of 1.20 atm by two different paths. (a) Path A is an isothermal, reversible expansion. (b) Path B has two parts. In step 1, the gas is cooled at constant volume until its pressure has fallen to 1.20 atm. In step 2, it is heated and allowed ...
Mathematical Operations
... built-in statistical functions can calculate s directly by inputting the individual measurements. A smaller value of s indicates a higher precision, meaning that the data is more closely clustered around the average. The standard deviation has a statistical significance. Thus, if a large number of m ...
... built-in statistical functions can calculate s directly by inputting the individual measurements. A smaller value of s indicates a higher precision, meaning that the data is more closely clustered around the average. The standard deviation has a statistical significance. Thus, if a large number of m ...
AQA Additional Sci C2 Revision Guide
... (soot particles). Many nanoparticles are made by design using nanotechnology. Nanoparticles of a material show different properties, compared to larger particles of the same material. One of the reasons for this is the much larger surface area of the nanoparticles compared to their volume i.e. they ...
... (soot particles). Many nanoparticles are made by design using nanotechnology. Nanoparticles of a material show different properties, compared to larger particles of the same material. One of the reasons for this is the much larger surface area of the nanoparticles compared to their volume i.e. they ...
Transition state theory
Transition state theory (TST) explains the reaction rates of elementary chemical reactions. The theory assumes a special type of chemical equilibrium (quasi-equilibrium) between reactants and activated transition state complexes.TST is used primarily to understand qualitatively how chemical reactions take place. TST has been less successful in its original goal of calculating absolute reaction rate constants because the calculation of absolute reaction rates requires precise knowledge of potential energy surfaces, but it has been successful in calculating the standard enthalpy of activation (Δ‡Hɵ), the standard entropy of activation (Δ‡Sɵ), and the standard Gibbs energy of activation (Δ‡Gɵ) for a particular reaction if its rate constant has been experimentally determined. (The ‡ notation refers to the value of interest at the transition state.)This theory was developed simultaneously in 1935 by Henry Eyring, then at Princeton University, and by Meredith Gwynne Evans and Michael Polanyi of the University of Manchester. TST is also referred to as ""activated-complex theory,"" ""absolute-rate theory,"" and ""theory of absolute reaction rates.""Before the development of TST, the Arrhenius rate law was widely used to determine energies for the reaction barrier. The Arrhenius equation derives from empirical observations and ignores any mechanistic considerations, such as whether one or more reactive intermediates are involved in the conversion of a reactant to a product. Therefore, further development was necessary to understand the two parameters associated with this law, the pre-exponential factor (A) and the activation energy (Ea). TST, which led to the Eyring equation, successfully addresses these two issues; however, 46 years elapsed between the publication of the Arrhenius rate law, in 1889, and the Eyring equation derived from TST, in 1935. During that period, many scientists and researchers contributed significantly to the development of the theory.