Sunday, April 12, 2015

Other properties do not depend on the total amount of mass in the system do not change with the cha


THERMODYNAMIC PROPERTIES OF FLUIDS That such friends in the previous si units for temperature section explained as applied thermodynamic processes, si units for temperature for this use a usual pattern in the oil industry, as is a pneumatic pump. http://procesostermodinamicosaplicacion.blogspot.com/ (to see previous article). This time we will talk about the thermodynamic properties of fluids, for which I will mention the usual fluids within the oil industry, as are the components that are commonly found. Process engineering is very interesting to know how the properties of solids, liquids si units for temperature and gases are determined to apply the Laws of Thermodynamics. The thermodynamic properties si units for temperature are characteristics that can be observed, measured si units for temperature or quantified in substances. The amount and type of properties that can be set for a system depend on the type of observation is established for system analysis. For example if the used approach is the macroscopic properties can be set as temperature, pressure, energy, internal energy and enthalpy and others, which in no way be established using the microscopic approach. These properties are classified as extensive or intensive depending upon their behavior by varying the length or mass of the fluid. Some properties are quantified for the entire amount of matter in the system, ie for extension, as the total volume occupied, the energy contained within, including material (mol) or mass (m). These properties change value to change the extension of the system si units for temperature are called extended.
Other properties do not depend on the total amount of mass in the system do not change with the change in extent, but indicate their repeatability in each unit system extension; in most cases, indicate the intensity with which presents an extensive property. These are called intensive properties and between them have the pressure, temperature and all properties per unit mass (specific) and specific gravity. Because these intensive properties are invariant with the extension of the system, allowing a direct relationship with the state of substances. There are three common ways to meet these properties si units for temperature 1) Tables of properties 2) Figures and Diagrams Thermodynamic 3) Correlations and Equations si units for temperature The main properties we analyze and determine for engineering applications are shown in Table 1.
Note: The data in the table above are based on standard conditions (14.7 psia @ 60 F) VAPOR PRESSURE This is the pressure at a given temperature at which two phases can coexist in equilibrium (for a "long" period). Design engineers (PROCESS ENGINEERING) we must realize the concepts of vapor pressure over liquid saturation pressure and vapor pressure over solid (sublimation pressure).
CRITICAL POINT Coordinates pressure (Pc) and temperature (Tc) characteristics of a fluid pressure higher Pc, you can not go from vapor to liquid by simple cooling and temperatures above Tc, you can not go from vapor to liquid by simple compression. TRIPLE POINT coordinates of pressure si units for temperature and temperature to which co-exist in equilibrium gaseous, liquid and solid phases. The triple point is a characteristic property of each substance. CLOSED SYSTEM AND SYSTEM ADIABATIC Closed system is a thermodynamic system where there is no exchange of matter si units for temperature between him and his environment. Adiabatic system is a thermodynamic system in which no heat interaction between him and his environment. THERMODYNAMIC SYSTEM amount of matter mass and fixed identity si units for temperature that is taken as a basis for a given study ... which is outside the system is known as environment or environment. si units for temperature The heat of vaporization heat of vaporization decreases with increasing T. At the critical si units for temperature point ΔHvap 0. Importantly, no heat of vaporization at temperatures above Tc. In the next chapter we will see some applications (in the oil industry) of treated here thermodynamic properties, where they will realize that the Process Engineers must have clear concepts vapor pressure over liquid saturation pressure and pressure vapor over solid (sublimation si units for temperature pressure). Until next time.


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