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For Questions 12 through 17, give a specific example of a process that has the energy changes and transfers described. (For example, if the question states “
∆Eth < 0, W ≠ 0, Q ≠ 0
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- The heat supplied is 500 J. The heat loss to the environment is 160 J. Step 2 Calculation: Write the expression for the work output from the heat engine. W=Q1-Q2 Here, W is the useful workout, Q1 is the supplied heat, and Q2 is the heat loss. Substitute, all known values in the above expression. W=400 J-160 J=240 J Thus, the useful work is 240 J. What is the efficiency of the heat engine in the preceding problem at top? a) 32% b) 54% c) 68%. d) 75% e) 175%arrow_forwardplease answer the following As a gasoline engine is running, an amount of gasoline containing 12,000 J of chemical potential energy is burned in 1 s. During that second, the engine does 4,000 J of work. What is the engine's efficiency (in percent)? The burning gasoline has a temperature of about 4,300°F (2,600 K). The waste heat from the engine flows into air at about 88°F (304 K). What is the Carnot efficiency (in percent) of a heat engine operating between these two temperatures?arrow_forwardA closed system undergoes a process during which 600 kJ of heat is added to the system and the stored energy increases by 1800 kJ. Calculate the work done.arrow_forward
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning