Specific heat constant pressure/volume

Gases and Vapors Hydrocarbons Reference Symbols i Chemical Formula Mol. Wt. 1r> 1/7 I a Mol. Wt. Critical Conditions Boiling Point (F) 14,7 Psia Specific Volume Cu ft/lb 14.7 Psia 81 60F (Z Facior Accounted For) Latent Heat of Vaporization (Btu/lb 14.7 Psia) Specific heat Constant Pressure (Cp 60F) Specific heat Constant Volume Specific heat ratio K = Cp/Cv... 

Capacitance of the space between the electrode and the iimer Helmholtz plane Constant pressure specific heat Constant pressure specific heat of ideal gas Molar constant pressure specific heat of ideal gas Constant volume specific heat Molar constant volume specific heat of ideal gas Constant volume specific heat of ideal gas Concentration of oxidant species Concentration of reductant species Carbonate ion Carbon monoxide Carbon dioxide... 

The value of the specific heat at constant pressure and constant volume is 1.404 at 0°C. 

Available data on the thermodynamic and transport properties of carbon dioxide have been reviewed and tables compiled giving specific volume, enthalpy, and entropy values for carbon dioxide at temperatures from 255 K to 1088 K and at pressures from atmospheric to 27,600 kPa (4,000 psia). Diagrams of compressibiHty factor, specific heat at constant pressure, specific heat at constant volume, specific heat ratio, velocity of sound in carbon dioxide, viscosity, and thermal conductivity have also been prepared (5). 

Density, Specific Heats at Constant Pressure and at Constant Volume and Velocity of Sound for Compressed... 

In the gas turbine (Brayton cycle), the compression and expansion processes are adiabatic and isentropic processes. Thus, for an isentropic adiabatic process 7 = where Cp and c are the specific heats of the gas at constant pressure and volume respectively and can be written as ... 

K = Cp/Cv the ratio of specific heats at constant pressure to constant volume. This ratio is 1.4 for most diatomic gases, g = 32.2ft/sec"... 

Cp = specific heat at constant pressure c = specific heat at constant volume... 

The integrated terms are simply the specific heat of the unit mass of adsorbent and its associated adsorbate. The specific heat at constant volume has been used for the adsorbate since, theoretically, there is no expansion of the adsorbate volume and the heat required to raise the temperature is the change in internal energy. In practice there will be some expansion and a pessimistically high estimate could use the specific heat at constant pressure The specific heat of the adsorbed phase is in any case difficult to estimate and it is common to approximate it to that of saturated liquid adsorbate at the same temperature. 

Specific heat The amount of heat (or mechanical work) required to raise the temperature of a unit mass of a substance one degree Celsius. In the case of gases there are two specific heats, according as to whether the heating takes place at constant pressure or at constant volume. 

The heat capacity of a subshince is defined as the quantity of heat required to raise tlie temperature of tliat substance by 1° the specific heat capacity is the heat capacity on a unit mass basis. The term specific heat is frequently used in place of specific heat capacity. This is not strictly correct because traditionally, specific heal luis been defined as tlie ratio of the heat capacity of a substance to the heat capacity of water. However, since the specific heat of water is approxinuitely 1 cal/g-°C or 1 Btiiyib-°F, the term specific heal luis come to imply heat capacity per unit mass. For gases, tlie addition of heat to cause tlie 1° tempcniture rise m iy be accomplished either at constant pressure or at constant volume. Since the mnounts of heat necessary are different for tlie two cases, subscripts are used to identify which heat capacity is being used - Cp for constant pressure or Cv for constant volume. Tliis distinction does not have to be made for liquids and solids since tliere is little difference between tlie two. Values of heat capacity arc available in the literature. ... 

Ratio of specific heat at constant pressure to that at constant volume=k... 

The heat capacity or specific heat of a unit mass of material is the amount of energy required to raise its temperature 1°C It can be measured either at constant pressure or constant volume. At constant pressure it can be larger than at constant volume, because additional energy is required to bring about a volume change against external pressure. 

The specific heat of a substance must always be defined relatively to a particular set of conditions under which heat is imparted, and it is here that the fluid analogy is very liable to lead to error. The number of heat units required to produce unit rise of temperature in a body depends in fact on the manner in which the heat is communicated. In particular, it is different according as the volume or the pressure is kept constant during the rise of temperature, and we have to distinguish between specific heats (and also heat capacities) at constant volume and those at constant pressure, as well as other kinds to be considered later. 

SQ) = (yp h1),- ( Q)p = (r4l%-Thus, cv, cp are the amounts of heat absorbed per unit increase of temperature at constant volume and at constant pressure respectively. They are the specific heats at constant volume and at constant jwessare respectively. 

The work done by an ideal gas of constant specific heat in passing from one isotherm to another is the same for all adiabatic paths, is independent of the initial or final pressures or volumes, and is proportional to the difference of temperature between the isotherms. 

The ratio of the specific heats at constant pressure and at constant volume is ... 

The velocity uw = fkP2v2 is shown to be the velocity of a small pressure wave if the pressure-volume relation is given by Pifi = constant. If the expansion approximates to a reversible adiabatic (isentropic) process k y, the ratio of the specific heats of the gases, as indicated in equation 2.30. 

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