Per cycle, engine A has a heat input of Q₁, a heat output of Q2, and produces work W. Engine Bhas a heat input of 3Q1, a heat output of 2Q2 and produces work 5W.(1) What is the ratio eA/eB of their efficiencies (numerical answer required, you can express itas a ratio)?(2) Use the first law of thermodynamics and the information from the two engines to write downa relation between the net heat and work for each engine.(3) Using (1) and (2), compute the efficiency of each engine (numerical answer required, bothcan be expressed as a ratio).

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Answered: Per cycle, engine A has a heat input of…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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1. An engine from a quarry vehicle used in the Build a Beach program of DEMR has a power requirement of 560 kW. Per hour of its operation, it ejects 234 MJ into its surroundings at 50 °C. If it behaves like a Carnot engine, answer the questions below. A. How much work (MJ) is done by the engine per hour of operation? B. What is the efficiency (%) of the engine?C. What is the temperature (°C) of the hot reservoir? 2. Determine the entropy change (kJ/K) associated to the conversion of 10 kg of ice at -11 °C to steam at 121 °C. 3. Anna and Beth are using another rare metal, the nth metal (c = 0.600 J/g-℃), to build the 5-kg cuirass of their design. Initially, the metal is at 2250 K. It is then submerged to 10 kg of water at 15 °C. If the remaining liquid water after submerging the metal is 8.5 kg, solve for the net entropy change (kJ/K) of the system.
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