Energy Balance on a Closed System

In this lesson, we will incorporate the effects of mass flow across the system boundaries on the

energy balance equation

.
In chapter 4, we applied the

1st Law

to closed systems.
Change in U, EK,EP
and other forms of energy
Net energy transfer by heat and work
In chapter 4, we discussed how heat and work interactions fit into the

1st Law

or

energy balance equation

for a closed system.
In this chapter, we need to discover how mass flow across the system boundary can be incorporated in the 1st Law or energy balance equation.
W
Sign convention arrow.
Q
Sign convention arrow.
Closed
System
This diagram shows a closed system with a system boundary enclosing it and sign convention arrows showing that heat transfer is positive when heat flow into the system and work is positive when it is done by the system.
Equation.
Equation.
Equation.
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Ch 5, Lesson B, Page 1 - Energy Balance on a Closed System