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Gauge Congratulations! I trust that after completing all the activities in this module, you I have now fully understood the concepts of heat and work, and the first law of thermodynamics. To further strengthen your mastery and crystalize your understanding, perform the following activity! Part 1 Multiple Choice: Read each question carefully. Choose the letter of the best answer. Write the letter of your choice on the answer sheet provided. 1. The internal energy of a system is initially 40 J. The system does 54 J of work. What is the system's final internal energy when a total of 65 J of energy is added to the system by heat? A. 29 J C. 70 J B. 51 J D. 159 J 2. While a gas does 900 J of work on its surroundings, 1,400 J of heat is added to the gas. What is the change in the internal energy of the gas? A. 500 J B. 900 J D. 2,300 J C. 1,400 J 3. If 1000 cal of heat are added to a gas, and the gas expands doing 750 J of work on its surroundings, what is the change in the internal energy of the gas? A. 3,346 J B. 3,436 J D. 4,633 J C. 4,363 J
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