General, Organic, and Biological Chemistry (3rd Edition)
3rd Edition
ISBN: 9780134042428
Author: Laura D. Frost, S. Todd Deal
Publisher: PEARSON
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Textbook Question
Chapter 5, Problem 5.46AP
Draw and label a reaction energy diagram for an exergonic reaction in which the free energy change (ΔG) is three times greater than its activation energy.
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The diagram shows the potential energy changes for a reaction pathway.Part 1: Does the diagram illustrate an endothermic or an exothermic reaction? Give reasons in support of your answer.Part 2: Describe how you can determine the total change in enthalpy and activation energy from the diagram and if each is positive or negative.
In studying a reaction that goes to completion (this is not a reversible reaction) what happens to the rate of the reaction with an increase in temperature? Will the rate increase, decrease, or stay the same?
Typical Chemical Potential Energy (PE) Diagram for an Exothermic Reaction
A catalyst provides an alternate
pathway for a reaction to occur. The
alternate pathway has a lower
activation energy (AE), meaning that
the reactant molecules do not need to
collide with as much energy in order
for a reaction to occur, so more
collisions result in a reaction, so the
reaction rate is faster.
Chemical
Potential
Energy
(Enthalpy)
Note that adding a catalyst
does not change the amount
of energy released (AH) for
the reaction.
Activation Energy (AE)
with a catalyst
PE of Reactants
AH
PE of Products
Rxn Progress
What effect does a catalyst have on the stoichiometry of the reaction?
What effect does the catalyst have on the mechanism of a reaction?
AE wlo a catalyst
Chapter 5 Solutions
General, Organic, and Biological Chemistry (3rd Edition)
Ch. 5 - When vinegar (CH3COOH) and baking soda (NaHCO3)...Ch. 5 - In your own words, define free energy change, G....Ch. 5 - Classify the following as exothermic or...Ch. 5 - Prob. 5.4PPCh. 5 - Prob. 5.5PPCh. 5 - Classify the following as spontaneous or...Ch. 5 - Prob. 5.7PPCh. 5 - Prob. 5.8PPCh. 5 - Prob. 5.9PPCh. 5 - Prob. 5.10PP
Ch. 5 - a. How does increasing the temperature increase...Ch. 5 - a. Describe activation energy for a chemical...Ch. 5 - Why does the rate of a chemical reaction decrease...Ch. 5 - Prob. 5.14PPCh. 5 - Enzymes increase the rate of a biological chemical...Ch. 5 - Prob. 5.16PPCh. 5 - Prob. 5.17PPCh. 5 - Prob. 5.18PPCh. 5 - Categorize the following reactions as synthesis,...Ch. 5 - Categorize the following reactions as synthesis,...Ch. 5 - Prob. 5.21PPCh. 5 - Prob. 5.22PPCh. 5 - Write the products and balance the following...Ch. 5 - Prob. 5.24PPCh. 5 - Prob. 5.25PPCh. 5 - List the differences between general chemical...Ch. 5 - Are the substances shown in italics undergoing...Ch. 5 - Prob. 5.28PPCh. 5 - Prob. 5.29PPCh. 5 - Prob. 5.30PPCh. 5 - Prob. 5.31PPCh. 5 - Prob. 5.32PPCh. 5 - Prob. 5.33PPCh. 5 - Prob. 5.34PPCh. 5 - Prob. 5.35PPCh. 5 - Prob. 5.36PPCh. 5 - Prob. 5.37PPCh. 5 - Write the main product of hydration for the...Ch. 5 - Methane (a.k.a. natural gas) can react with oxygen...Ch. 5 - Prob. 5.40APCh. 5 - Which reaction occurs at a faster rate, an...Ch. 5 - Prob. 5.42APCh. 5 - Prob. 5.43APCh. 5 - Two curves for the same reaction are shown in the...Ch. 5 - Prob. 5.45APCh. 5 - Draw and label a reaction energy diagram for an...Ch. 5 - Prob. 5.47APCh. 5 - Prob. 5.48APCh. 5 - Write the products that would result from the...Ch. 5 - Prob. 5.50APCh. 5 - Prob. 5.51APCh. 5 - Prob. 5.52APCh. 5 - Prob. 5.53APCh. 5 - Prob. 5.54APCh. 5 - Prob. 5.55APCh. 5 - Identify the reactant that is oxidized and the...Ch. 5 - Prob. 5.57APCh. 5 - Write the products of the following reactions:Ch. 5 - Prob. 5.59APCh. 5 - Acetylsalicylic acid (aspirin) can be synthesized...Ch. 5 - Prob. 5.61APCh. 5 - Fill in the missing organic produce for the...Ch. 5 - Prob. 5.63APCh. 5 - Prob. 5.64APCh. 5 - How do low-carb diets work? We store glucose...Ch. 5 - Prob. 5.66CPCh. 5 - Prob. 5.67CPCh. 5 - Prob. 5.68CPCh. 5 - Prob. 5.69CPCh. 5 - Which reaction has the larger activation energy?Ch. 5 - Prob. 1IA.2QCh. 5 - A catalyst speeds up a chemical reaction by...Ch. 5 - Prob. 1IA.4QCh. 5 - Examine your sketch from question 3. Does a...Ch. 5 - Prob. 1IA.6QCh. 5 - Prob. 2IA.1QCh. 5 - Prob. 2IA.2QCh. 5 - Prob. 2IA.3QCh. 5 - One of the reactions in the data set is a single...Ch. 5 - Prob. 2IA.5QCh. 5 - Categorize the following reactions as a synthesis,...Ch. 5 - Prob. 3IA.1QCh. 5 - Prob. 3IA.2QCh. 5 - Prob. 3IA.3QCh. 5 - Prob. 3IA.4QCh. 5 - Prob. 3IA.5QCh. 5 - Prob. 1ICCh. 5 - Find out how unsaturated fats are saturated and...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- Draw an energy diagram graph for an endothermic reaction where no catalyst is present. Then draw an energy diagram graph for the same reaction when a catalyst is present. Indicate the similarities and differences between the two diagrams.arrow_forward. Account for the increase in reaction rate brought about by a catalyst.arrow_forwardBy which of the following mechanisms does a catalyst operate? a. It decreases the activation energy barrier for a reaction. b. It serves as a reactant and is consumed. c. It increases the temperature of a reaction. d. It increases the concentration of reactants.arrow_forward
- Sketch an energy diagram graph representing an exothermic reaction, and label the following. a. Average energy of reactants b. Average energy of products c. Activation energy d. Amount of energy liberated during the reactionarrow_forwardFor each of the changes listed will the rate of the following chemical reaction increase, decrease, or remain the same? Fe(s)+2HCl(aq)FeCl2(aq)+H2(g) a. the concentration of HCl is decreased b. the iron is ground into a powder c. a catalyst is added to the reaction mixture d. the temperature of the solution is decreasedarrow_forwardSketch energy diagrams to represent each of the following. Label the diagrams completely and tell how they are similar to each other and how they are different. a. Exothermic exergonic reaction with activation energy b. Exothermic exergonic reaction without activation energyarrow_forward
- Define these terms: (a) unimolecular reaction (b) bimolecular reaction (c) elementary reaction (d) overall reactionarrow_forwardSubstances that poison a catalyst pose a major concern for many engineering designs, including those for catalytic converters. One design option is to add materials that react with potential poisons before they reach the catalyst. Among the commonly encountered catalyst poisons are silicon and phosphorus, which typically form phosphate or silicate ions in the oxidizing environment of an engine. Group 2 elements are added to the catalyst to react with these contaminants before they reach the working portion of the catalytic converter. If estimates show that a catalytic converter will be exposed to 625 g of silicon during its lifetime, what mass of beryllium would need to be included in the design?arrow_forwardIn each of the following three reaction coordinate diagrams, state: (a) Whether the reaction is exothermic or endothermic. (b) Whether the reaction is the slowest, the fastest, or intermediate in rate. (c) If all three reactions have the same entropy change between the reactant and product, which reaction has the largest favorable G0.arrow_forward
- The following equation represents a reversible decomposition: CaCO3(s)CaO(s)+CO2(g) Under what conditions will decomposition in a closed container proceed to completion so that no CaCO3 remains?arrow_forwardDraw a reaction energy diagram for a two-step exothermic reaction whose second step is faster thanthe first step. Label the intermediate, transition states, ΔH, and activation energies.arrow_forwardExamine the diagram of the energy in a chemical reaction below. Press the hotspot that indicates the enthalpy of the reaction. Energy Activated complex Reactants ΔΗ Reaction Activation energy Prod tsarrow_forward
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