(4 pts) Explain the changes that occur at the molecular‐level that lead to the energy differences...
(4 pts) Explain the changes that occur at the molecular‐level that lead to the energy differences in the catalyzed vs non‐catalyzed reactions. Hint: Consider collision theory and the molecular events that occur in a catalyzed vs non‐catalyzed reaction
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(4 pts) Explain the changes that occur at the molecular‐level
that lead to the energy differences...
Many chemical reactions release energy, while others require energy to happen. These energy changes that occur...
Many chemical reactions release energy, while others require energy to happen. These energy changes that occur during chemical reactions are due to changes in bonding between the reactant molecules and product molecules. Breaking bonds between atoms always requires energy, while creating bonds between atoms always releases energy. Analyze each of the two chemical reactions below by calculating the total amount of energy needed to break the bonds in the reactants, the total amount of energy released upon bond formation in...
13. (14 pts) MO Theory Draw the complete (core and valence) molecular orbital energy level diagram...
13. (14 pts) MO Theory Draw the complete (core and valence) molecular orbital energy level diagram for the homonuclear diatomic molecule Be2. Use standard MO symbols to label the energy levels (That is: o, o, , or n*, as needed, with subscripts indicating which atomic orbitals formed them.) a. Sketch the molecular orbital formed when two 2p orbitals, one each on each Be atom, overlap to form a o antibonding MO b. Using your MO energy level diagram in (a),...
(3 marks) QUESTION 2 5p a) The energy level diagram for Sodium, Na, is 4.0 shown...
(3 marks) QUESTION 2 5p a) The energy level diagram for Sodium, Na, is 4.0 shown opposite. ap 3.0 Calculate the exact energy (in electron volts) of the photon emitted when an electron relaxes from the 4p to the 3s level in a sodium atom. 3p 2.0 (2 marks) 1.0F DATA Planck's constant 6.63 10 Js Excitation Atomie emission The speed of light 3.00 x 10 ms" 1 eV= 1.60 x 10-19J b) Explain, with the aid of an Energy-level...
QUESTION 4 1 points Consider the unlabelled Molecular Orbital Energy-level Diagram shown here. What is the...
QUESTION 4 1 points Consider the unlabelled Molecular Orbital Energy-level Diagram shown here. What is the appropriate label for the Highest Occupied Molecular Orbital (HOMO)? Energy ==== — 1 25 -... ---- 11 _1s 1 ооооооооооо
question 1 2 3 4 5 6 Which are correct? In molecular orbital (MO) energy level...
question 1 2 3 4 5 6
Which are correct? In molecular orbital (MO) energy level diagram for cyanide ion? The MO shows: (a) bond order = 2 (b) bonder order =3 ) cyanide ion is paramagnetic ) cyanide ion is! diamagnetic (e) HOMO is nu HOMO is og (6%) (2) Write down the diatomic molecules 2p orbitals for (a), (b), (6%) (3) What is the bond order of (a) OF(b) to which atom ( O or F ) the...
Chemical reactions involve the making and breaking of chemical bonds. Since different types of bonds have different bond...
Chemical reactions involve the making and breaking of chemical
bonds. Since different types of bonds have different bond
strengths, the energy of the reacting system changes as the
reaction progresses. A graph that shows the change in energy as a
function of the progress of the reaction is known as a reaction
profile.
According to the theories of chemical reactions, when molecules
collide in the correct orientation with a sufficient amount of
energy, an activated complex or transition state is...
Please explain Free Energy Changes in Chemical Reactions: Calculating. Below you will find key questions. 1....
Please explain Free Energy Changes in Chemical Reactions: Calculating. Below you will find key questions. 1. Calculate the standard free energy change for a reaction using the temperature, the standard enthalpy change, and the standard entropy change. 2. Interpret the meaning of the mathematical sign for the standard free energy change. 3. Calculate the standard free energy change for a reaction using the standard free energies of formation of products and reactants. 4. Calculate the standard free energy change for...
please explain Question 4: Level 3 (U12, L.G. 9) Write the correct molecular equation, complete ionic...
please explain
Question 4: Level 3 (U12, L.G. 9) Write the correct molecular equation, complete ionic equation, and net ionic equation for the reaction that occurs between cobalt(II) chloride and sodium hydroxide. Question 1: Level 1 (Unit 13) Which of the following statements accurately describe a system at equilibrium? I. There are constant amounts of reactant and product. II. There are equal amounts of reactant and product. III. The forward and backward reactions have equal rates. IV. The forward and...
8. (10 pts) (a) (6 pts) Suppose a system consists of N noninteracting, indistin guishable, identical particles and th...
8. (10 pts) (a) (6 pts) Suppose a system consists of N noninteracting, indistin guishable, identical particles and that each particle has available to it only two quantum electronic states, whose energies are 0 and a. Find expressions for z, Z and U. Note: Because we don 't consider translational energy here, so the 1/N! should be om itted when writing Z in terms of z (b) (4 pts) For NO, the ground electronic level and the first exited electronic...
3) (D) Which one of the following molecular orbitals will have the highest energy? 4) Choose...
3) (D) Which one of the following molecular orbitals will have the highest energy? 4) Choose how many "occupied MOS" can occur for the conjugated t-system of B-carotene and LED compounds? NH beta-carotene (a) 22 and 6 5) The diene LED material (b) 11 and 6 (c) 22 and 12 (d) 11 and 12 is not suitable for Diels-Alder [4+2) cycloaddition? 6) Which one of bicyclic isomers is appropriate for both Diels-Alder and 1,2-/1.4-additions? 7) Both 1.2- and 1,4-additions of...
13. (14 pts) MO Theory Draw the complete (core and valence) molecular orbital energy level diagram for the homonuclear diatomic molecule Be2. Use standard MO symbols to label the energy levels (That is: o, o, , or n*, as needed, with subscripts indicating which atomic orbitals formed them.) a. Sketch the molecular orbital formed when two 2p orbitals, one each on each Be atom, overlap to form a o antibonding MO b. Using your MO energy level diagram in (a),...
(3 marks) QUESTION 2 5p a) The energy level diagram for Sodium, Na, is 4.0 shown opposite. ap 3.0 Calculate the exact energy (in electron volts) of the photon emitted when an electron relaxes from the 4p to the 3s level in a sodium atom. 3p 2.0 (2 marks) 1.0F DATA Planck's constant 6.63 10 Js Excitation Atomie emission The speed of light 3.00 x 10 ms" 1 eV= 1.60 x 10-19J b) Explain, with the aid of an Energy-level...
QUESTION 4 1 points Consider the unlabelled Molecular Orbital Energy-level Diagram shown here. What is the appropriate label for the Highest Occupied Molecular Orbital (HOMO)? Energy ==== — 1 25 -... ---- 11 _1s 1 ооооооооооо
question 1 2 3 4 5 6
Which are correct? In molecular orbital (MO) energy level diagram for cyanide ion? The MO shows: (a) bond order = 2 (b) bonder order =3 ) cyanide ion is paramagnetic ) cyanide ion is! diamagnetic (e) HOMO is nu HOMO is og (6%) (2) Write down the diatomic molecules 2p orbitals for (a), (b), (6%) (3) What is the bond order of (a) OF(b) to which atom ( O or F ) the...
Chemical reactions involve the making and breaking of chemical
bonds. Since different types of bonds have different bond
strengths, the energy of the reacting system changes as the
reaction progresses. A graph that shows the change in energy as a
function of the progress of the reaction is known as a reaction
profile.
According to the theories of chemical reactions, when molecules
collide in the correct orientation with a sufficient amount of
energy, an activated complex or transition state is...
please explain
Question 4: Level 3 (U12, L.G. 9) Write the correct molecular equation, complete ionic equation, and net ionic equation for the reaction that occurs between cobalt(II) chloride and sodium hydroxide. Question 1: Level 1 (Unit 13) Which of the following statements accurately describe a system at equilibrium? I. There are constant amounts of reactant and product. II. There are equal amounts of reactant and product. III. The forward and backward reactions have equal rates. IV. The forward and...
8. (10 pts) (a) (6 pts) Suppose a system consists of N noninteracting, indistin guishable, identical particles and that each particle has available to it only two quantum electronic states, whose energies are 0 and a. Find expressions for z, Z and U. Note: Because we don 't consider translational energy here, so the 1/N! should be om itted when writing Z in terms of z (b) (4 pts) For NO, the ground electronic level and the first exited electronic...
3) (D) Which one of the following molecular orbitals will have the highest energy? 4) Choose how many "occupied MOS" can occur for the conjugated t-system of B-carotene and LED compounds? NH beta-carotene (a) 22 and 6 5) The diene LED material (b) 11 and 6 (c) 22 and 12 (d) 11 and 12 is not suitable for Diels-Alder [4+2) cycloaddition? 6) Which one of bicyclic isomers is appropriate for both Diels-Alder and 1,2-/1.4-additions? 7) Both 1.2- and 1,4-additions of...
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