Answer
A
Work Step by Step
$\dot{m}_1c_pT_1+\dot{m}_2c_pT_2=(\dot{m}_1+\dot{m}_2)c_pT_3$
$\dot{m}_1=4\ kg/min,\ T_1=280\ K,\ \dot{m}_2=3\ kg/min,\ T_2=343\ K$
$T_3=307\ K=34°C$
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: 5-198
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