Determine in which case is heat added to the system? (a) ΔU = –43 J, w = 40 J; or (b) ΔU = 31 J, w = 34 J

University Physics Volume 2
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Chapter3: The First Law Of Thermodynamics
Section: Chapter Questions
Problem 58P: Consider the processes shown below. In the processes AB and BC, 3600 J and 2400 J of heat are added...
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Determine in which case is heat added to the system? (a) ΔU = –43 J, w = 40 J; or (b) ΔU = 31 J, w = 34 J? 2. In a particular process, 500 J of work is done on the system, which gives off 200 J of heat. What is the value of for the process? 3. Which system does more work? (a) U = -436 J, q= 400 J or (b) U = 317 J, q= 347 J (U = q + W) 4. Calculate (a) q when a system does 44 J of work and its energy decreases by 62 J (b) U for a gas that releases 48 J of heat and has 112 J of work done on it.
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