Organic Chemistry
5th Edition
ISBN: 9780078021558
Author: Janice Gorzynski Smith Dr.
Publisher: McGraw-Hill Education
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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
Using this reversible reaction, answer the following:
N204= 2NO2
(colorless) (reddish-brown)
0° C
25° C
100° C
Ice Water
Room
Temperature
Hot Water
-As the temperature increased, what happened to the [N204]?
-Was the formation of reactants or products favored by the addition of heat?
-Which reaction is exothermic?
-If the change of enthalpy of this reaction when proceeding left to right is 14 kcal, which chemical equation is correct?
N204= 2NO2 + 14 kcal
N204= 2NO2, HR = +14 kcal
N204 + 14 kcal =
2NO2
N204= 2NO2, HR = -14 kcal
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
Chapter 6 Solutions
Organic Chemistry
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_forward7. Estimate the enthalpy of reaction (in kJ/mol) for the combustion of methane. Be sure to show a lewis structure for each molecule. CH, (g) + 20, (g) ·CO, (g) + H,O (g) Bond Bond Enthalpy (kJ/mol) C-O 351 C=0 799 CEO 1070 O-O 142 O=0 498 C-H 414 O-H 460arrow_forward
- 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?arrow_forwardCalculate AH for the reaction: 2NH3 (g) + O2(g) → N2H4 (1) + H2O(1) given the following data: 2NH3 (g) + 3N20(g) → 4N2(g) + 3H2O(1) AH = –1010. kJ N20(g) + 3H2 (9) → N¿H4(1)+H2O(1) AH = -317 kJ N2H4 (1) + O2 (g) → N2(g)+ 2H2O(1) AH = -623 kJ H2 (9) + 02 (9) → H2O(1) AH = -286 kJ ΔΗ - kJarrow_forwardUsing bond energies from the table, estimate ΔH for the reaction below. The OH group on the product side is attached to a carbon.CH2=CH2(g) + H2O(g) ↔ CH3CH2OH(g) Bond Energies, kJ/mol Single Bonds H C N O S F Cl Br I H 432 C 411 346 N 386 305 167 O 459 358 201 142 S 363 272 --- --- 286 F 565 485 283 190 284 155 Cl 428 327 313 218 255 249 240 Br 362 285 243 201 217 249 216 190 I 295 213 --- 201 --- 278 208 175 149 Multiple Bonds C=C 602 C=N 615 C=O 799 CºC 835 CºN 887 CºO 1072 N=N 418 N=O 607 S=O (in SO2) 532 NºN 942 O2 494 S=O (in SO3) 469arrow_forward
- Calculate AH for the reaction NH3 (g) + CH4 (g) → HCN (g) + 3 H2 (g) , from the following data. N2 (g) + 3 H2 (g) → 2 NH3 (g) ΔΗ- – 91. 8 kJ /mol C (s, graphite) + 2 H2 (g) → CH4 (g) - 74. 9 kJ / mol AH = 2 C (s, graphite) + H2 (g) + N2 (g) → 2 HCN (g) AH = ΔΗ: 270. 3 kJ / molarrow_forwardFor each of the following reactions, draw the enthalpy diagram showing the relative energy state of reactants and products. i). SO2 (g) → S(s)+ O2 (g) ΔH = +296 kJ ii). 2 C2H2 (g) + 5 O2 (g) → 4 CO2 (g) + 2 H2O(l) ΔH = -2598.8 kJarrow_forwardAt 10°C, Keq for a reaction is 100. At 30°C, Keq = 10. Does enthalpy increase or decrease during the reaction?arrow_forward
- Consider these reactions: Reaction 1: H2(g) + Cl2(g) 2HCI(g) AH = –184.6 kJ Reaction 2: 20F2(g) O2(8) + 2 F2(g) AH: -49.4 kJ Reaction 3: N2(8) + 202(8) - 2NO2(g) ΔΗ+66.4 kJarrow_forwardCH,(9) + 2 O,(g) AH = -809.0 kJ/mol rxn Co,(9) + 2 H,0(g) ΔΗ. = -81.3 kJ 'cond 2 H,0U) Given the energy diagram above, what is AH when two moles of methane are combusted? -401.15 kJ +1604.6 kJ -802.3 kJ +802.3 kJ +401.15 kJ O -1604.6 kJarrow_forwardBalanced chemical equation for the combustion of ethanol as a reference. C₂H5OH (1)+30₂ (g) → 2 CO₂ (g) + 3 H₂O(g) C-H=410 kJ/mol Selected Bond Energies O-H=463 kJ/mol How much energy is required to break the bonds in ethanol? Show your work. C-O=358 kl/mol C-C= 348 kJ/mol H-Carrow_forward
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