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, CaHsan, 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 CHran by a certain amount or increasing the temperature of 1 mol of HO, by the same amount? 3. Calculate the enthaipy change for the reaction P.Os () + 2 0z ) - P.0:015) given the following enthalpies of reaction: Pa +3 0z6) - P,0,au) Pac +5 0z - P,0,a 6) AH = -1640.1 k) AH = -2940.1 k) 4. From the enthalpies of reaction AH = -537 k) Hz + F2 - 2 HFa C +2 Fa) - CF 2C +2 H2 ) - C,Ha) AH = -680 k AH = +523 k) calculate AH for the reaction of ethylene with F: 12 THERMOCHEMISTRY C,H. ) +6 F6) - 2CF. + 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: CH, CH, CH, HC-CH-CH-CH-CH, The complete combustion of ane 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 CeHisn. 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 Al + Fe,0,u) - Al,0,c1) + 2 Fes) 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.
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, CaHsan, 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 CHran by a certain amount or increasing the temperature of 1 mol of HO, by the same amount? 3. Calculate the enthaipy change for the reaction P.Os () + 2 0z ) - P.0:015) given the following enthalpies of reaction: Pa +3 0z6) - P,0,au) Pac +5 0z - P,0,a 6) AH = -1640.1 k) AH = -2940.1 k) 4. From the enthalpies of reaction AH = -537 k) Hz + F2 - 2 HFa C +2 Fa) - CF 2C +2 H2 ) - C,Ha) AH = -680 k AH = +523 k) calculate AH for the reaction of ethylene with F: 12 THERMOCHEMISTRY C,H. ) +6 F6) - 2CF. + 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: CH, CH, CH, HC-CH-CH-CH-CH, The complete combustion of ane 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 CeHisn. 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 Al + Fe,0,u) - Al,0,c1) + 2 Fes) 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.
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...
Related questions
Question
Answer questions from number 2 (a and b), number 3, number 4, number 5 (a and b), number 6
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 7 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: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Chemistry for Engineering Students
Chemistry
ISBN:
9781337398909
Author:
Lawrence S. Brown, Tom Holme
Publisher:
Cengage Learning
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781337399074
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Chemistry for Engineering Students
Chemistry
ISBN:
9781337398909
Author:
Lawrence S. Brown, Tom Holme
Publisher:
Cengage Learning
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781337399074
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning
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
ISBN:
9781305079243
Author:
Steven S. Zumdahl, Susan A. Zumdahl
Publisher:
Cengage Learning