Package: Loose Leaf for Organic Chemistry with Biological Topics with Connect Access Card
5th Edition
ISBN: 9781260170405
Author: SMITH
Publisher: MCG
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Textbook Question
Chapter 6, Problem 6.44P
Consider the following reaction:
a. Use curved arrows to show the movement of electrons.
b. Calculate
c. Draw an energy diagram assuming that
d. What is
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5.
Calculate AH for the following reaction.
C6H6(1) + 02 (g) --
---→ C(s) + H20(1)
State whether the reaction is exothermic or endothermic and why. The molar enthalpies of combustion
of carbon, water and benzene, are -394 kJ/mol, -286 kJ/mol, and -3,267.4 kJ/mol, respectively.
[4A,2T]
I
Which statement best describes the energy change for the
reaction associated with this energy diagram?
products
reactants
Reaction Progress
O This is an exothermic reaction with AH 0
This is an endothermic reaction with AH > 0
O This is an exothermic reaction with AH > 0
This is an endothermic reaction with AH < 0
Energy
The reaction that was on the screen when you started and its derivative demonstrate that the reaction enthalpy, ΔH, changes sign when a process is reversed.
Consider the reaction
H2O(l)→H2O(g), ΔH =44.0kJ
What will ΔH be for the reaction if it is reversed?
Chapter 6 Solutions
Package: Loose Leaf for Organic Chemistry with Biological Topics with Connect Access Card
Ch. 6 - Problem 6.1 Classify each transformation as...Ch. 6 - Prob. 6.2PCh. 6 - Problem 6.3 By taking into account...Ch. 6 - Problem 6.4 Use curved arrows to show the movement...Ch. 6 - Problem 6.5 Follow the curved arrows and draw the...Ch. 6 - Prob. 6.6PCh. 6 - Problem 6.7 Use the values in Table 6.2 to...Ch. 6 - Prob. 6.8PCh. 6 - aWhich Keq corresponds to a negative value of G,...Ch. 6 - Given each of the following values, is the...
Ch. 6 - Given each of the following values, is the...Ch. 6 - The equilibrium constant for the conversion of the...Ch. 6 - Prob. 6.13PCh. 6 - For a reaction with H=40kJ/mol, decide which of...Ch. 6 - For a reaction with H=20kJ/mol, decide which of...Ch. 6 - Draw an energy diagram for a reaction in which the...Ch. 6 - Prob. 6.17PCh. 6 - Prob. 6.18PCh. 6 - Problem 6.19 Consider the following energy...Ch. 6 - Draw an energy diagram for a two-step reaction,...Ch. 6 - Which value if any corresponds to a faster...Ch. 6 - Prob. 6.22PCh. 6 - Problem 6.23 For each rate equation, what effect...Ch. 6 - Prob. 6.24PCh. 6 - Identify the catalyst in each equation. a....Ch. 6 - Draw the products of homolysis or heterolysis of...Ch. 6 - Explain why the bond dissociation energy for bond...Ch. 6 - Classify each transformation as substitution,...Ch. 6 - Prob. 6.29PCh. 6 - 6.30 Draw the products of each reaction by...Ch. 6 - 6.31 (a) Add curved arrows for each step to show...Ch. 6 - Prob. 6.32PCh. 6 - Prob. 6.33PCh. 6 - Prob. 6.34PCh. 6 - Calculate H for each reaction. a HO+CH4CH3+H2O b...Ch. 6 - Homolysis of the indicated CH bond in propene...Ch. 6 - Prob. 6.37PCh. 6 - Prob. 6.38PCh. 6 - 6.39. a. Which value corresponds to a negative...Ch. 6 - Prob. 6.40PCh. 6 - For which of the following reaction is S a...Ch. 6 - Prob. 6.42PCh. 6 - Prob. 6.43PCh. 6 - 6.44 Consider the following reaction: .
Use curved...Ch. 6 - Prob. 6.45PCh. 6 - Draw an energy diagram for the Bronsted-Lowry...Ch. 6 - Prob. 6.47PCh. 6 - Indicate which factors affect the rate of a...Ch. 6 - Prob. 6.49PCh. 6 - 6.50 The conversion of acetyl chloride to methyl...Ch. 6 - Prob. 6.51PCh. 6 - Prob. 6.52PCh. 6 - The conversion of (CH3)3Cl to (CH3)2C=CH2 can...Ch. 6 - 6.54 Explain why is more acidic than , even...Ch. 6 - Prob. 6.55PCh. 6 - Prob. 6.56PCh. 6 - Prob. 6.57PCh. 6 - Although Keq of equation 1 in problem 6.57 does...Ch. 6 - Prob. 6.59P
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- Calculate the enthalpy change when 1.0(1 g of methane is burned in excess oxygen according to the reaction CH,(g) 4- 2O2(g) ->CO2(g) + H-CH/) 1H = -891 kJ/molarrow_forwardn Fig. 10.1, what kind of energy does ball A possess initially when at rest at the top of the hill? What kind of energies are involved as ball A moves down the hill? What kind of energy does ball A possess when it reaches the bottom of the hill and stops moving after hitting ball B? Where did the energy gained by ball B, allowing it to move up the hill, come from?arrow_forwardCalculate ΔH° for each reaction. a. HO• + CH4 → •CH3 + H2O b. CH3OH + HBr → CH3Br + H2Oarrow_forward
- Ff.316.arrow_forwardΔH= H products - H reactants a. Explain the equation above. b. Now, deduce the sign of ΔH for an exothermic and endothermic reaction at constant pressure. c. Enthalpy is a state function. Now discuss what does the enthalpy of reaction means.arrow_forward= 40 kJ/mol, decide if the following statement is true. If the statement is false, For a reaction with AH choose the statement that makes it true. Select the single best answer. The product is favored at equilibrium. (Assume the entropy term is small compared to the enthalpy term) The statement is false. Neither the product nor the starting material is favored at equilibrium. The statement is false. The equilibrium position of the reaction cannot be approximated. The statemnent is true. The statement is false. The starting material is favored at equilibrium.arrow_forward
- D. NO₂(g) → N2(g) + O₂( 12. Use the graphs below to determine the enthalpy of reaction for the conversion of butane, C4H10, to butanol, C4H,OH. Enthalpy, H (kJ) Enthalpy Change during the Combustion Reaction of Butane C₂H₁0 + 13/20₂ AH -2881.9 kJ/mol 4CO₂+ 5H₂0 Reaction progress A. 169 kJ/mol B. -169 kJ/mol C. 5594.8 kJ/mol D. -5594.8 kJ/mol Enthalpy, H (kJ) Enthalpy Change during the Combustion Reaction of Butanol C,H,OH+60₂ AH=-2712.9 kJ/mol 4C0₂ + 5H₂0 Reaction progress obtained:arrow_forwardTo a test tube containing 5.0 ml of 1.00 M NaOH at 27°C in a calorimeter, 5.0 ml of 2.00 M HNO3 at the same temperature was added, the heat generated by the reaction was monitored. Which of the following is TRUE? a.Reaction is exothermic; solution will turn pink upon addition of phenolphthalein. b.Heat is absorbed by the system; no color change will be observed upon addition of phenolphthalein. c.Heat is released by the system; no color change will be observed upon addition of phenolphthalein. d.Reaction is endothermic; solution will turn pink upon addition of phenolphthalein.arrow_forwardConsider the following reaction:2CH3OH(g)→2 CH4(g) + O2(g) H=+252.8 kJ a. Is this reaction exothermic or endothermic? Explain briefly. b. Calculate the amount of heat transferred when 24.0 g of CH3OH(g) is decomposed by this reaction at constant pressure c. For a given sample of CH3OH, the enthalpy change during the reaction is 82.1 kJ. How many grams of methane, CH4, are produced? d. How many kilojoules of heat are released when 38.5 g of CH4 (g) reacts completely with O2 (g) to form CH3OH( g) at constant pressure?arrow_forward
- Fill in the missing reactant or reagent or product to bring about the following chemical reactions.arrow_forwardCalculate the value (calories) for the heat of reaction. NaOH(s) ─HCl→ Na+(aq) + Cl-(aq) + H2O(l) Useful Information: Volume of HCl: .055 LVolume of water: .045 LVolume total: .1 LMolarity of HCl: 2.12 MMass of NaOH: 4.00 gΔT for reaction C: 21.3°C Specific Heat Capacity of Sodium Chloride: .94 cal g^-1 C^-1arrow_forwardIn some parts of the world, butadiene was produced from ethanol, C2H&O by the unbalanced reaction: C2H60 (g) → C4H6 (g) + H20 (g) + H2 (g) 1. Balance the above reaction. I'd like you to determine whether this reaction is exo- or endothermic, but you need more information first. The following questions will walk you through this process. 2. Given the reaction and thermochemical data below, use Hess' Law to calculate A H,xn for the gas-phase combustion of butadiene. 11 O2 (g) = ? kJ C4H6 (g) + 4 CO2 (g) + 3 H20(1) - 2 H2O(g) A H; = -484 kJ 2 H2 (g) + O2 (g) + 6 02 (9) 4 CO2 (g) + 4 H2O(g) AHxn =-2527 kJ C4H8 (g) AHxn =+132 kJ C4H8 (g) C4H6 (g) + H2 (g) AHvap = +41 kJ H20 (1) H2O (g)arrow_forward
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