Homework Help is Here – Start Your Trial Now!
Science
Chemistry
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: Principles and Reactions
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter8: Thermochemistry
Section: Chapter Questions
Problem 31QAP: A student is asked to calculate the amount of heat involved in changing 10.0 g of liquid bromine at...
See similar textbooks
icon
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
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
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Phase Diagrams
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.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Chemistry for Engineering Students
Chemistry for Engineering Students
Chemistry
ISBN:
9781337398909
Author:
Lawrence S. Brown, Tom Holme
Publisher:
Cengage Learning
Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781337399074
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning
Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781133949640
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning
Chemistry: An Atoms First Approach
Chemistry: An Atoms First Approach
Chemistry
ISBN:
9781305079243
Author:
Steven S. Zumdahl, Susan A. Zumdahl
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781133611097
Author:
Steven S. Zumdahl
Publisher:
Cengage Learning
SEE MORE TEXTBOOKS