Sketch a qualitative reaction energy diagram for a chemical reaction with and without a catalyst. Assume the uncatalyzed reaction is endothermic. Note: Because the sketches are only qualitative, the energies in them don't have to be exact. They only have to have the right relationship to each other. For example, if one energy is less than another, that fact should be clear in your sketch. energy Uncatalyzed reaction reactants reaction coordinate products energy Catalyzed reaction reactants reaction coordinate X products 5

Sketch a qualitative reaction energy diagram for a chemical reaction with and without a catalyst. Assume the uncatalyzed reaction is endothermic. Note: Because the sketches are only qualitative, the energies in them don't have to be exact. They only have to have the right relationship to each other. For example, if one energy is less than another, that fact should be clear in your sketch. energy Uncatalyzed reaction reactants reaction coordinate products energy Catalyzed reaction reactants reaction coordinate X products 5

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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O KINETICS AND EQUILIBRIUM Interpreting a reaction energy diagram Consider a hypothetical chemical reaction: A+B-C+D (In this equation A, B, C and D stand for some unknown chemical formulas.) Here is an energy diagram for the reaction: energy (kJ/mol) 400- 300- 200- 100- 0 4+3 reaction coordinate Use the energy diagram to answer these questions. What is the heat of reaction? Is the reaction exothermic or endothermic? Can you determine the activation energy? Can you determine the activation energy of the reverse reaction? C+D+A+B ☐kJ/mol Exothermic Endothermic ONeither O Yes, it's] kJ/mol No. O Yes, it's kJ/mol No. X 0/5
Why does the rate of most reactions decrease over time? A. A decrease in reactant concentration reduces the frequency of successful collisions. B. A decrease in temperature reduces the average kinetic energy of the particles. C. An increase in product concentration interferes with the effectiveness of the catalyst. D. An increase in pressure of the system reduces the movement and energy of particles.
Determine whether each description corresponds to an endothermic reaction or an exothermic reaction. Heat is a reactant in the reaction. Exothermic The reaction mixture feels cool from the outside. Endothermic Heat is a product in the reaction. Endothermic The reaction mixture feels warm from the outside. Exothermic
10. An example of an exothermic reaction would show energy: Group of answer choices a) as part of the reactant side of the reaction b) being absorbed by the chemical reaction c) at a higher state then when the reaction started. d) as part of the product side of the reaction.
An increase in temperature drives an endothermic reaction toward the reactants. True False
A sugar cube does not easily burn when held over a lighted match so you open an ash tray and roll the sugar cube on the tray coating the sugar cube with ash. You light this sugar cube once again and it easily ignites What factor caused the rapid ignition of the sugar cube? a. Nature of reactants b. Concentration of reactants c. Surface area d. Presence of a catalyst
endothermic reaction a. The reaction absorbs heat. b. The amount of enthalpy change is -140 Kj c. H2 + Nz NH3 +500K) d. The energy of reactants is larger than the energy of the products. Q2: study the following graphs and answer the questions. Reaction Coordinate A. Label the previous graph. B. Which type of reaction does it represent it. explain your answer. C. Does it release or absorb energy ? Q3: hydrogen gas reacts with Oxygen gas to produce water and 70 Kj of heat, write the equation of the chemical reaction nwea
Is the reaction exothermic or endothermic will any he be released or absorbed. If you said heat will be released or absorbed in the second part of the question calculate how much it will be released or absorbed round your answer to three significant digits. Please check your answer
KINETICS AND EQUILIBRIUM Interpreting a reaction energy diagram CLISIG A+B C+D (In this equation 4, B, C and D stand for some unknown chemical formulas.) Here is an energy diagram for the reaction: 400 300- energy 200. (k]/mol) C + D T00 - reaction coordinate Use the energy diagram to answer these questions. What is the heat of reaction? || k]/mol O Exothermic Is the reaction exothermic or endothermic? O Endothermic O Neither O Yes, it's k]/mol Can you determine the activation energy? O No. Can you datermine the activation energy of the reverse reaction? O Ves, it's k/mol C-D 4+B O No. Explanation Check 1II
Consider a hypothetical chemical reaction: A+B → C+D (In this equation A, B, C and D stand for some unknown chemical formulas.) Here is an energy diagram for the reaction: energy (kJ/mol) 400 300- 200- 100. 0 A+B C + D reaction coordinate Use the energy diagram to answer these questions. What is the heat of reaction? Is the reaction exothermic or endothermic? Are the reactants (A+B) or the products (C+D) more chemically stable? kJ/mol O Exothermic Endothermic Neither Reactants (4+B) O Products (C+D) Neither
Use the following PE diagram to answer the following questio PE (kJ) 100 80 60 40 20 A + B C + D Progress of the reaction Is the reaction exothermic or endothermic? Exothermic Endothermic You need more information.
Part IV Cabbage Juice Indicator Chop cabbage into small pieces until you have about 2 cups of chopped cabbage. Boil for at least ten minutes to allow time for the color to leach out of the cabbage. Allow it to cool for 15 min • Filter out the plant material to obtain a red-purple-bluish colored liquid. 1. Add 1-2 drops of cabbage juice into a small bowl 2. Add 3-5 drops of vinegar into the bowl with the cabbage juice 3. Observe Is this a chemical change or physical change? Explain? Store the excess cabbage juice in your refrigerator, you will need them for future experiments.