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Directions: Solve the following word problem. Use a separate paper for your solution and box the final answer. 1. A system releases 125 kJ of heat while 104 kJ of work is done on the system. Calculate the change in internal energy (in kJ). 2. The work done when the gas is compressed in a cylinder is 462 J. During this process, there is a heat transfer of 128 J from the gas to the surroundings. Calculate the energy change for this process. 3. A system undergoes a process consisting of the following two steps: Step 1: The system absorbs 73 J of heat while 35 J of work is done on it. Step 2: The system absorbs 35 J of heat while performing 72 J of work. Calculate the change in internal energy for the overall process (in J). Directions: Answer the following word problems. Write your answer on your answer sheet. 1. Calculate AE for each of the following cases: Q- + 51 kJ, W - - 15 kJ Q- + 100. kJ, w -- 65 kJ Q-- 65 kJ, W - - 20 kJ In which of these cases does the system do work on the surroundings? 2. Calculate AE for each of the following: Q--47 kJ, W - +88 kJ Q- +82 kJ, W - +47 kJ Q- +47 kJ, W -0 In which of these cases do the surroundings do work on the system?

Directions: Solve the following word problem. Use a separate paper for your solution and box the final answer. 1. A system releases 125 kJ of heat while 104 kJ of work is done on the system. Calculate the change in internal energy (in kJ). 2. The work done when the gas is compressed in a cylinder is 462 J. During this process, there is a heat transfer of 128 J from the gas to the surroundings. Calculate the energy change for this process. 3. A system undergoes a process consisting of the following two steps: Step 1: The system absorbs 73 J of heat while 35 J of work is done on it. Step 2: The system absorbs 35 J of heat while performing 72 J of work. Calculate the change in internal energy for the overall process (in J). Directions: Answer the following word problems. Write your answer on your answer sheet. 1. Calculate AE for each of the following cases: Q- + 51 kJ, W - - 15 kJ Q- + 100. kJ, w -- 65 kJ Q-- 65 kJ, W - - 20 kJ In which of these cases does the system do work on the surroundings? 2. Calculate AE for each of the following: Q--47 kJ, W - +88 kJ Q- +82 kJ, W - +47 kJ Q- +47 kJ, W -0 In which of these cases do the surroundings do work on the system?

Chemistry for Engineering Students
Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter9: Energy And Chemistry
Section: Chapter Questions
Problem 9.94PAE
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Directions: Solve the following word problem. Use a separate paper for your solution and box the final answer. 1. A system releases 125 kJ of heat while 104 kJ of work is done on the system. Calculate the change in internal energy (in kJ). 2. The work done when the gas is compressed in a cylinder is 462 J. During this process, there is a heat transfer of 128 J from the gas to the surroundings. Calculate the energy change for this process. 3. A system undergoes a process consisting of the following two steps: Step 1: The system absorbs 73 J of heat while 35 J of work is done on it. Step 2: The system absorbs 35 J of heat while performing 72 Jof work. Calculate the change in internal energy for the overall process (in J). Directions: Answer the following word problems. Write your answer on your answer sheet. 1. Calculate AE for each of the following cases: Q- + 51 kJ, W -- 15 kJ Q- + 100. kJ, W - - 65 kJ Q-- 65 kJ, W - - 20 kJ In which of these cases does the system do work on the surroundings? 2. Calculate AE for each of the following: Q--47 kJ, W - +88 kJ Q- +82 kJ, W - +47 kJ Q- +47 kJ, W - 0 In which of these cases do the surroundings do work on the system? Assessment Direuuons: Choose the letter of the correct answer. Write your answer on your answer sheet. 1. The 1* Law of Thermodynamics is, basically, the same as which law from Physics 1? A. Newton's First Law C. Newton's Second Law D. Law of Conservation of Momentum B. Law of Conservation of Mass 2. What is the equation for the first law of thermodynamics? A. U- Q + W C.U-Q-W 3. According to the first law of thermodynamics, A. Total energy of a system remains constant B. U--Q + W D. U+ Q + W -0 B. Work done by a system is equal to the heat transferred by the system C. Total internal energy of a system during a process remains constant D. None of the above 4. Which of the following properties represent the energy in storage? A. Work В. Неat C. Pressure D. Internal Energy 5. What quantities appear in the First Law of Thermodynamics? A. work, heat, entropy C. force, mass, acceleration B. enthalpy, entropy, heat D. work, heat, thermal energy
Transcribed Image Text:Directions: Solve the following word problem. Use a separate paper for your solution and box the final answer. 1. A system releases 125 kJ of heat while 104 kJ of work is done on the system. Calculate the change in internal energy (in kJ). 2. The work done when the gas is compressed in a cylinder is 462 J. During this process, there is a heat transfer of 128 J from the gas to the surroundings. Calculate the energy change for this process. 3. A system undergoes a process consisting of the following two steps: Step 1: The system absorbs 73 J of heat while 35 J of work is done on it. Step 2: The system absorbs 35 J of heat while performing 72 Jof work. Calculate the change in internal energy for the overall process (in J). Directions: Answer the following word problems. Write your answer on your answer sheet. 1. Calculate AE for each of the following cases: Q- + 51 kJ, W -- 15 kJ Q- + 100. kJ, W - - 65 kJ Q-- 65 kJ, W - - 20 kJ In which of these cases does the system do work on the surroundings? 2. Calculate AE for each of the following: Q--47 kJ, W - +88 kJ Q- +82 kJ, W - +47 kJ Q- +47 kJ, W - 0 In which of these cases do the surroundings do work on the system? Assessment Direuuons: Choose the letter of the correct answer. Write your answer on your answer sheet. 1. The 1* Law of Thermodynamics is, basically, the same as which law from Physics 1? A. Newton's First Law C. Newton's Second Law D. Law of Conservation of Momentum B. Law of Conservation of Mass 2. What is the equation for the first law of thermodynamics? A. U- Q + W C.U-Q-W 3. According to the first law of thermodynamics, A. Total energy of a system remains constant B. U--Q + W D. U+ Q + W -0 B. Work done by a system is equal to the heat transferred by the system C. Total internal energy of a system during a process remains constant D. None of the above 4. Which of the following properties represent the energy in storage? A. Work В. Неat C. Pressure D. Internal Energy 5. What quantities appear in the First Law of Thermodynamics? A. work, heat, entropy C. force, mass, acceleration B. enthalpy, entropy, heat D. work, heat, thermal energy
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