HW2_Solutions.pdf

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Department
Mechanical Engineering
Course
MECHENG 235
Professor
Donald Siegel
Semester
Winter

Description
THE UNIVERSITY OF MICHIGAN Department of Mechanical Engineering ME 235 Thermodynamics I / Winter 2014 / Section 002 HW 2 Solutions Due date: Jan. 23 2014 2.27 Give the missing property of P- v -T and x for water at a. P = 10 MPa, 0.003 m /kg b. 1 MPa, 190C c. 200C, 0.1 m /kg d. 10 kPa, 1C° 2.29 Determine whether refrigerant R-410A in each of the following states is a compressed liquid, a superheated vapor, or a mixture of saturated liquid and vapor. 3 a. 50°C, 0.05 m /kg b. 1.0 MPa, 20° C c. 0.1 MPa, 0.1 m /kg d. −20°C, 200 kPa 2.37 Determine the specific volume for R-410A at these states: a. –15 C, 400 kPa b. 20 C, 1500 kPa c. 20 C, quality 25% 2.38 Give the missing property of P, T, v and x for CH 4 at: a. T = 155 K, v = 0.04 m /kg3
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