MECHENG 235 Lecture Notes - Lecture 1: Pressure Measurement, Intermolecular Force, Control Volume

• School: U of M
• Department: Mechanical Engineering
• Course: MECHENG 235
• Professor: Jason Martz

Document Summary

Control volumes- contain matter and devices under study. Closed control volume- encloses a fixed amount of mass (control mass) Open control volume- mass can enter or leave. Phase- a quantity of matter that is homogeneous throughout (solid, liquid, gas) State- a specific condition expressed by a unique set of property values. Two independent and intensive properties are needed to specify the state of a pure substance. Extensive properties- depends on mass (mass, volume, energy) Process- the succession of states that the system passes through from an initial to a final state. Compressing air to end up with a smaller volume. Process path or type- a specific succession of states is usually given a name that relates to the condition under which this happens. This is given by the way the device behaves as a process equation or device equation. Cycle- a process path that ends in the initial state.