JJ Thompson Webquest
... type of atom, therefore rejecting Newton's theory of chemical affinities. Dalton inferred proportions of elements in compounds by taking ratios of the weights of reactants, setting the atomic weight of hydrogen to be identically one. He proposed that chemical elements combine in integral ratios. Des ...
... type of atom, therefore rejecting Newton's theory of chemical affinities. Dalton inferred proportions of elements in compounds by taking ratios of the weights of reactants, setting the atomic weight of hydrogen to be identically one. He proposed that chemical elements combine in integral ratios. Des ...
Chemistry Midterm Review 2006
... 5. Both methane gas(CH4) and hydrogen gas(H2) are in a container at 67 C. a. Which gas will have the greatest speed? b. Do they have the same average kinetic energy of different average kinetic energy? 4. Know the relationship between the variables of a gas a) As the temperature of a gas decreases, ...
... 5. Both methane gas(CH4) and hydrogen gas(H2) are in a container at 67 C. a. Which gas will have the greatest speed? b. Do they have the same average kinetic energy of different average kinetic energy? 4. Know the relationship between the variables of a gas a) As the temperature of a gas decreases, ...
Chemical equations must be balanced.
... equation, so C is balanced. However, on the left side, H has a subscript of 4, which means there are four hydrogen atoms. On the right side, H has a subscript of 2, which means there are two hydrogen atoms. Also, there are two oxygen atoms on the left and three oxygen atoms on the right. Because of ...
... equation, so C is balanced. However, on the left side, H has a subscript of 4, which means there are four hydrogen atoms. On the right side, H has a subscript of 2, which means there are two hydrogen atoms. Also, there are two oxygen atoms on the left and three oxygen atoms on the right. Because of ...
File
... or decrease? Justify your answer with a one or two sentence explanation. [k f and kr are the specific rate constants for the forward and the reverse reactions, respectively.] 1983 C Graphical methods are frequently used to analyze data and obtain desired quantities. (a) 2 HI(g) --> H2(g) + I2(g) The ...
... or decrease? Justify your answer with a one or two sentence explanation. [k f and kr are the specific rate constants for the forward and the reverse reactions, respectively.] 1983 C Graphical methods are frequently used to analyze data and obtain desired quantities. (a) 2 HI(g) --> H2(g) + I2(g) The ...
Chapter 6
... • One mole (mol) of any substance contains 6.02 x 1023 (Avogadro’s Number) units of that substance. • One mole (mol) of a substance is the gram mass value equal to the amu mass of the substance. – Calculated the same as amu’s for a molecule ...
... • One mole (mol) of any substance contains 6.02 x 1023 (Avogadro’s Number) units of that substance. • One mole (mol) of a substance is the gram mass value equal to the amu mass of the substance. – Calculated the same as amu’s for a molecule ...
The Mole Ratio · the ratio between the molar amounts of any two
... · the method of predicting the quantity of a reactant or product in a chemical reaction based on the quantity of another reactant or product in the reaction ...
... · the method of predicting the quantity of a reactant or product in a chemical reaction based on the quantity of another reactant or product in the reaction ...
Energy
... Natural gas consists primarily of methane, CH4. It is used in a process called steam reforming to prepare a gaseous mixture of carbon monoxide and hydrogen for ...
... Natural gas consists primarily of methane, CH4. It is used in a process called steam reforming to prepare a gaseous mixture of carbon monoxide and hydrogen for ...
Midterm Exam 2
... 2) (10 points) In a particular photoelectron spectrum using 22.00 eV photons, electrons were ejected with kinetic energies of 10.00 eV, 8.25 eV, and 5.50 eV. Sketch an energy level diagram for the species, showing the ionization energies of the three identifiable ...
... 2) (10 points) In a particular photoelectron spectrum using 22.00 eV photons, electrons were ejected with kinetic energies of 10.00 eV, 8.25 eV, and 5.50 eV. Sketch an energy level diagram for the species, showing the ionization energies of the three identifiable ...
Chapter 3
... convert moles of one reactant to moles of other reactants and products (use the stoichiometric ratio from the balanced chemical equation), and then ...
... convert moles of one reactant to moles of other reactants and products (use the stoichiometric ratio from the balanced chemical equation), and then ...
Unit 8 Note Packet
... 1b. Use the proper symbols in a chemical equation such as (s), (l), (g), (aq). 2a. Balance a chemical equation by using coefficients to make sure that each type of atom has the same amount on the reactant and product side of the chemical equation. 3a. Define enthalpy. 3b. Given an energy graph/diagr ...
... 1b. Use the proper symbols in a chemical equation such as (s), (l), (g), (aq). 2a. Balance a chemical equation by using coefficients to make sure that each type of atom has the same amount on the reactant and product side of the chemical equation. 3a. Define enthalpy. 3b. Given an energy graph/diagr ...
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.