Thermodynamics pp 215-288 | Cite as

# The First Law: Vapours and Gases in Closed and Open Systems

Chapter

## Abstract

We shall begin this programme by looking at problems involving a vapour, usually steam, in closed systems. The system is initially in a known equilibrium state, and as a result of heat and work interactions at the boundary, proceeds to a second equilibrium state. We need to use the equation of the First Law applied to a closed system to solve such a problem. This was given in Frame 11 of Programme 3 as:

where the energy term

*E*was shown in Frame 20 of Programme 3 to consist of internal energy, kinetic energy and potential energy. So what would be the First Law equation for problems with steam in closed systems?## Preview

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## Copyright information

© J. Simonson 1993