Thermodynamics HW Solutions 7

# Thermodynamics HW Solutions 7 - Chapter 1 Basics of Heat...

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Chapter 1 Basics of Heat Transfer 1-22C Warmer. Because energy is added to the room air in the form of electrical work. 1-23C Warmer. If we take the room that contains the refrigerator as our system, we will see that electrical work is supplied to this room to run the refrigerator, which is eventually dissipated to the room as waste heat. 1-24C Mass flow rate is the amount of mass flowing through a cross-section per unit time whereas the volume flow rate is the amount of volume flowing through a cross-section per unit time. They are related to each other by where ρ is density. & m & V & & mV = ρ 1-25 Two identical cars have a head-on collusion on a road, and come to a complete rest after the crash. The average temperature rise of the remains of the cars immediately after the crash is to be determined. Assumptions 1 No heat is transferred from the cars. 2 All the kinetic energy of cars is converted to thermal energy.
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