Chapter 6: Multiple Choice 11. Which of the following is a true statement about the energy diagram shown below? (a) A labels the E, of the reaction and B labels AH of the reaction. (b) A labels the AH of the reaction and B labels E, of the reaction. (c) C labels the activation energy. (d) D labels the reactants and E labels the products.

Q: Reaction Rates, Activation Energy, and Catalysts Base your answers to practice questions 9 through…

A: Please find the attached images for answer

Q: Please answer the following questions for each term: Catalyst and Activation energy What…

A: Since you have posted a question with multiple sub-parts , we will solve first three sub- parts for…

Q: Explain the following : (a) A lump of coal burns at moderate rate in air while coal dust burns…

A: Average rate of reaction is defined as ratio of change in concentration of reactant or product by…

Q: This graph shows changes in concentration during a chemical reaction. Use the definition of reaction…

A: The reaction rate or rate of reaction is the speed at which a chemical reaction takes place, defined…

Q: What do you mean by the term chemical reaction rate?

A: The rate of a reaction generally depends on the concentration of reactants. In other words the rate…

Q: The first graph below represents the energy level diagram for an uncatalyzed reaction. Which other…

A: We have seen that the rate of many reactions can be accelerated by catalysts. A catalyst speeds up…

Q: Select the statement that is most likely to be true in regards to reaction rates. As temperature…

A: Activation energy is the minimum amount of energy needed for a reaction to take place. And every…

Q: The change in temperature from 10 °C to 20 °C is found to double the rate of a particular chemical…

A: Activation energy is defined as minimum amount of energy needed to complete the reaction.

Q: A catalyst is not consumed in a reaction. How do you think increasing the amount of catalyst would…

A: A catalyst is a substance that helps in increasing the rate of reaction. It brings forth alternative…

Q: Copper roofs on houses form patina (copper oxide) over the course of years due to the reaction with…

A: Since the reaction is taking place over the course of years means that the rate of the reaction is…

Q: What is activation energy?  Select one:

A:

Q: 9. A chemical reaction can only occur if the reactants have enough energy to reach the activation…

A: Given: To explain how energy is released in an exothermic reaction and how a catalyst is used to…

Q: 8. Answer the following questions with words or phrases: a.) The proposes that in order for a…

A: NOTE: Since you've posted multiple sub-parts, we'll solve only the first three sub-parts for you. To…

Q: b) How does a catalyst increase the rate of reaction? Cite familiar situations where catalyst is…

A: The solution is given below -

Q: All changes saved 10 The rate of a reaction depends on many factors such as the concentration of the…

A: Rate of reaction depends on concentration of reactant.  Increase in concentration of reactants,…

Q: All chemical reactions have a set amount of activation energy in order for the reaction to move to…

A: Endothermic :(energy absorbed) products energy > reactants energy Exothermic:(energy released)…

Q: Base your answers to practice questions 43 and 44 on the information below. Given the reaction:…

A:

Q: In the following energy profile, pathway A represents the (...) reaction and the reaction is (. . *…

A: The reaction energy profile diagrams in plotted against extent of reaction and energy. According to…

Q: The following statements about activation energy are all factual, EXCEPT: A. Catalysts lower the…

A: Activation energy is defined as the minimum energy that needs to be acquired by the reactant…

Q: Which of the following statements below is true concerning the activation energy for a reaction?…

A: The energy profile diagram for the reaction is given as;

Q: Which of the following defines activation energy?   A.The minimum amount of energy required to…

A: In the given question we have to define the activation energy, it is defined as the minimum amount…

Q: C What are the similarities between the two diagrams? Curve A Curve B Reaction progress Reaction…

A: Answer :-  The similarity between the two diagrams is-  the average energy of the reactants and…

Q: topic: chemical kineteics is it true that a reaction that occurs quickly must be an irreversible…

A: A reaction that occurs quickly must be an irreversible reaction it is true.

Q: examine the image, which shows four chemical systems of colliding molecules. Which chemical system…

A: The given four systems contains the various number of molecules which collides accordingly. The…

Q: Activation energy Reactants Overall energy change Products Progress of reaction The above energy…

A:

Q: Draw “Energy vs Reaction Coordinate graph” at 30ºC. Assume that the reaction occurs as A+B → C.…

A: Explanation

Q: Draw a graph showing the reaction pathway for an overallexothermic reaction with two intermediates…

A: For a chemical reaction the energy profile diagram shows the theoretical representation of reaction…

Q: Adding a catalyst to a reaction increases the reaction rate by O a) decreasing the activation energy…

A: Catalysts are the substances which alter the rate of the reaction without getting consumed.

Q: 1. Explain the following: a) Reaction Rate b) Collision theory c) Activation energy d) Catalyst

A: 1 (a) Reaction rate: The reaction rate  is the speed at which a chemical reaction takes place,…

Q: a. Explain how a catalyst increases the speed of a chemical reaction. b. Draw a simple energy…

A: a)

Q: Why is the reaction rate for reactants defined as the negative  of the change in reactant…

A: In a reaction, reactants forms products.The reactants are being used up for the formation of…

Q: Select the true statement regarding catalysis of chemical reactions Catalysts appear in the overall…

A: Catalysis is reaction in which catalyst is used.

Q: . a. Explain in your own words, what is meant by the term "activation energy." b. How can the idea…

A: 1.a  Activation energy is the minimum amount of energy required to start a chemical reaction.…

Q: c. Draw a reaction diagram for the reaction between C27H29OSS and NH4CI. Label the enthalpy,…

A: Given: Reaction of thymol blue with ammonium chloride To find: Energy profile diagram Solution:…

Q: What does it mean for a reaction to release energy? The relative potential energy of the reaction…

A:

Q: 17. The diagram below shows the energy profile of a reaction, A+B_making C+D Potential Energy A +B C…

A: Rate constant increases exponentially when activation energy decreases.

Q: 2 Define "activation energy" b What is the role of a catalyst in chemical reactions? Draw an energy…

A: 2(a) The minimum energy that must be provided to the compounds in a chemical reaction in order to…

Q: The change in temperature from 10 °C to 20 °C is found to double the rate of a particular chemical…

A: By increasing temperature from 10 to 20°C  rate of reaction increase by two times it means the…

Q: 16. Use the diagram to answer these questions. 75 50 25 Products Reactants -25 Reaction progress a)…

A: Given: The energy of reactants is 0 kJ/mol. The energy of products is 24 kJ/mol.

Q: A sugar cube does not easily burn when held over a lighted match so you open an ash tray and roll…

A: We need to find why the sugar cube iginite when it was coated with ash.

Q: what name is given to the minimum amount of energy needed by particles for them to react when they…

A: Quantitative computations of elementary bi-molecular gaseous processes are done using collision…

Q: For a reaction with activation energy of 44 kJ and heat of reaction of -31 kJ and product energy of…

A: Given  Activation energy = 44 kJ Energy of products = 90 kJ Heat of reaction = -31kJ Energy of…

Q: How does catalyst affect the rate of reaction? What happens to the activation energy with the…

A: To explain: the effect of catalyst on the rate of reaction? effect of catalyst on activation…

Q: Which from the graphical representation that shows increasing rate of reaction? D A B

A:

Q: In the following energy profile, pathway A represents the ( .) reaction and the reaction is (. .) *…

A: In the given figure, pathway A is an uncatalyzed reaction and the reaction is exothermic.  Therefore…

Q: What is a catalyst? How does a catalyst increase the rate of a chemical reaction?

A: To find: What is a catalyst.  How does a catalyst increase the rate of the reaction

Q: Explain what happens in a chemical reaction? what does activation energy (EA) mean?

A: A chemical reaction is used to represent a chemical change.

Q: Energy Diagram Reaction Time (min) Which of the following statements is true for the graph shown…

A: The products have lower potential energy then the reactants, and the ∆H is negative.

UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or  ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.