Answer
B
Work Step by Step
$[\dot{m}c_p(T_1-T_2)]_a=[\dot{m}c_p(T_2-T_1)]_w$
$\dot{m}_a=\dot{m}_w,\ T_{2,a}=20°C,\ T_{1,a}=90°C,\ T_{1,w}=15°C,\ c_{p,a}=1.005\ kJ/kg.K,\ c_{p,w}=4.18\ kJ/kg.K$:
$T_{2,w}=31.83°C$
Thermodynamics: An Engineering Approach 8th Edition
by Cengel, Yunus; Boles, Michael
Published by
McGraw-Hill Education
ISBN 10:
0-07339-817-9
ISBN 13:
978-0-07339-817-4
Chapter 5 - Mass and Energy Analysis of Control Volumes - Problems - Page 273: 5-194
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