Problem 1 (12pt) In an ideal Otto cycle of air, suppose the air is compressed to 650 K and 1800 kPa before heat addition, and waste heat is rejected at 680 K and 180 kPa. Account for the variation of air's specific heats and determine a. (4pt) Sketch the processes of the cycle on a T-s diagram. On the diagram, clearly specify the conserved quantity / quantities of each process. b. (6pt) the air's internal energy at the beginning of each process; c. (2pt) the heat added to each kg of air and the heat rejected by each kilogram of air;

Problem 1 (12pt) In an ideal Otto cycle of air, suppose the air is compressed to 650 K and 1800 kPa before heat addition, and waste heat is rejected at 680 K and 180 kPa. Account for the variation of air's specific heats and determine a. (4pt) Sketch the processes of the cycle on a T-s diagram. On the diagram, clearly specify the conserved quantity / quantities of each process. b. (6pt) the air's internal energy at the beginning of each process; c. (2pt) the heat added to each kg of air and the heat rejected by each kilogram of air;

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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4. a. Use the following reactions and AH° data to determine AH° for Ca2 (aq) + 20H (aq) + H,(g) Ca(s) +2H,0(1) - Answer: -431.2 kJ > Known reactions: H'(aq) + OH (aq) H,0(1) AH° = -55.9 kJ -> %3D Ca(s) + 2H°(aq) Ca (aq) + H2(g) AH° = -543.0 kJ -> %3D b. What is AH° in J? 198 CHEM 111
Question 3: In steam power plants, open feedwater heaters are frequently utilized to heat the feedwater by mixing it with steam bled off the turbine at some intermediate stage. Consider an open feedwater heater that operates at a pressure of 1000 kPa. Feedwater at 50°C and 1000 kPa is to be heated with superheated steam at 200°C and 1000 kPa. In an ideal feedwater heater, the mixture leaves the heater as saturated liquid at the feedwater pressure. Determine the ratio of the mass flow rates of the feedwater and the superheated vapor for this case.
11.5 What is the heat effect when 20 kg of LiCI(s) is added to 125 kg of an aqueous solution containing 10- wt-% LiCl in an isothermal process at 25oC ?
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