5. Gasoline is composed primarily of hydrocarbons, including many with eight carbon atoms, called octanes. One of the deanest-buming octanes is a compound called 2,3,4- trimethylpentane, which has the following structural formula: CH, CH, CH, HC-CH-CH-CH-CH, The complete combustion of one mole of this compound to COng and H,O leads to AH = -5064.9 k). a. Write a balanced equation for the combustion of 1 mol of CaHran. b. By using the information in this problem and data in the thermodynamic properties table, calculate AH; for 2,3,4-trimethylpentane.
5. Gasoline is composed primarily of hydrocarbons, including many with eight carbon atoms, called octanes. One of the deanest-buming octanes is a compound called 2,3,4- trimethylpentane, which has the following structural formula: CH, CH, CH, HC-CH-CH-CH-CH, The complete combustion of one mole of this compound to COng and H,O leads to AH = -5064.9 k). a. Write a balanced equation for the combustion of 1 mol of CaHran. b. By using the information in this problem and data in the thermodynamic properties table, calculate AH; for 2,3,4-trimethylpentane.
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...
Related questions
Question
Answer Question number 5 (a and b)
![4Gılll Gilll
00:21
* 67%
f [Template] Mo... /
Answer the following problems:
1. Two solid objects, A and B, are placed in boiling water and allowed to come to
the temperature of the water. Each is then lifted out and placed in separate
beakers containing 1000 g of water at 10.0 °C. Object A increases the water
temperature by 3.50 °C; B increases the water temperature by 2.60 C.
a. Which object has the larger heat capacity?
b. What can you say about the specific heats of A and B?
2. The specific heat of octane, CsHss0), is 2.22 Jig-K.
a. How many J of heat are needed to raise the temperature of 80.0 g of
octane from 10.0 to 25.0 °C?
b. Which will require more heat, increasing the temperature of 1 mol of
CH18, by a certain amount or increasing the temperature of 1 mol of
HOm by the same amount?
3. Calculate the enthalpy change for the reaction
P.0a (4) + 2 02 (0) - P,010(5)
given the following enthalpies of reaction:
AH = -1640.1 k)
Pa (s) + 302 (9) - P,0.4)
Pa (s) + 5 02 (9) - P,010 (9)
AH = -2940.1 k)
4. From the enthalpies of reaction
H2 (9) + F2 (0) - 2 HF)
C9 +2 F2 (0) - CF. (6)
2 C) +2 H2 (0) - CHa (0)
AH = -537 k)
AH = -680 k/
AH = +52.3 k)
calculate AH for the reaction of ethylene with F2:
12
THERMOCHEMISTRY
...
CH4 (9) + 6 F2 (9) + 2 CF, () + 4 HF)
5. Gasoline is composed primarily of hydrocarbons, including many with eight
carbon atoms, called octanes. One of the deanest-buming octanes is a
compound called 2,3,4- trimethylpentane, which has the following structural
formula:
сн, сн, сн,
H;C-CH-CH-CH-CH,
The complete combustion of one mole of this compound to COzig and H2Og
leads to AH° = -5064.9 k).
a. Write a balanced equation for the combustion of 1 mol of CaH18n.
b. By using the information in this problem and data in the thermodynamic
properties table, calculate AH for 2,3,4-trimethylpentane.
6. The following is known as the thermite reaction:
2 Alg + Fe,0s(4) - Al,03(9) + 2 Feg)
This highly exothermic reaction is used for welding massive units, such as propellers for
large ships. Using standard enthalpies of formation, calculate AH° for this reaction.
I hope you'll enjoy the task
Answer Key](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb59a689e-7f86-4e73-87b2-4001b6c913ab%2Fafee87d7-2e43-466b-b548-cfb48b4b82f7%2Fwcsbfe1_processed.jpeg&w=3840&q=75)
Transcribed Image Text:4Gılll Gilll
00:21
* 67%
f [Template] Mo... /
Answer the following problems:
1. Two solid objects, A and B, are placed in boiling water and allowed to come to
the temperature of the water. Each is then lifted out and placed in separate
beakers containing 1000 g of water at 10.0 °C. Object A increases the water
temperature by 3.50 °C; B increases the water temperature by 2.60 C.
a. Which object has the larger heat capacity?
b. What can you say about the specific heats of A and B?
2. The specific heat of octane, CsHss0), is 2.22 Jig-K.
a. How many J of heat are needed to raise the temperature of 80.0 g of
octane from 10.0 to 25.0 °C?
b. Which will require more heat, increasing the temperature of 1 mol of
CH18, by a certain amount or increasing the temperature of 1 mol of
HOm by the same amount?
3. Calculate the enthalpy change for the reaction
P.0a (4) + 2 02 (0) - P,010(5)
given the following enthalpies of reaction:
AH = -1640.1 k)
Pa (s) + 302 (9) - P,0.4)
Pa (s) + 5 02 (9) - P,010 (9)
AH = -2940.1 k)
4. From the enthalpies of reaction
H2 (9) + F2 (0) - 2 HF)
C9 +2 F2 (0) - CF. (6)
2 C) +2 H2 (0) - CHa (0)
AH = -537 k)
AH = -680 k/
AH = +52.3 k)
calculate AH for the reaction of ethylene with F2:
12
THERMOCHEMISTRY
...
CH4 (9) + 6 F2 (9) + 2 CF, () + 4 HF)
5. Gasoline is composed primarily of hydrocarbons, including many with eight
carbon atoms, called octanes. One of the deanest-buming octanes is a
compound called 2,3,4- trimethylpentane, which has the following structural
formula:
сн, сн, сн,
H;C-CH-CH-CH-CH,
The complete combustion of one mole of this compound to COzig and H2Og
leads to AH° = -5064.9 k).
a. Write a balanced equation for the combustion of 1 mol of CaH18n.
b. By using the information in this problem and data in the thermodynamic
properties table, calculate AH for 2,3,4-trimethylpentane.
6. The following is known as the thermite reaction:
2 Alg + Fe,0s(4) - Al,03(9) + 2 Feg)
This highly exothermic reaction is used for welding massive units, such as propellers for
large ships. Using standard enthalpies of formation, calculate AH° for this reaction.
I hope you'll enjoy the task
Answer Key
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
Knowledge Booster
Learn more about
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.Recommended textbooks for you
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY