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![]() The first law of thermodynamics states that t he change in the total energy stored in a system equals the net energy transferred to the system in the fo rm of heat and work. Internal energy is a state function its magnitude depends on the state only. Internal energy is a property of a system.īoth heat and work must cross the boundary between a system and its surroundings.Ī system possesses a total energy and an internal energy.īoth heat and work are path functions their magnitudes depend on the states and the specific process path. ![]() Table 4.4.1 Comparison of heat, work and internal energyīoth heat and work are energy transfer mechanisms. Table 4.4.1 summarizes the main differences between heat and work, and internal energy. They play an important role in the first law of thermodynamics. Both heat and work are energy transfer mechanisms. The first law of thermodynamics is essentially an energy conservation law. The First Law of Thermodynamics for Closed SystemsĤ.4 The first law of thermodynamics for closed systems ![]()
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