D. Specific volume is defined as the number of cubic meters occupied by one kilogram of matter….Specific Volume Formulas
- ν = V / m where V is volume and m is mass.
- ν = 1 /ρ = ρ-1 where ρ is density.
- ν = RT / PM = RT / P where R is the ideal gas constant, T is temperature, P is pressure, and M is the molarity.
What is specific volume of steam?
SPECIFIC VOLUME OF STEAM The specific volume is the volume occupied by the unit mass of a substance . It is expressed in m³/kg . The volume of water and steam increase with the increase in temperature.
What is the specific volume of saturated steam?
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| Property | Metric | |
|---|---|---|
| State | Saturated Steam Use the general steam table for non-saturated steam | |
| Density | Saturated Vapor ( g) | 0.59816 |
| Specific Volume | Saturated Liquid (vf) | 0.0010435 |
| Saturated Vapor (vg) | 1.6718 |
How does pressure affect steam properties?
When water molecules heat up, they attain kinetic energy. The higher the pressure of a boiler the more heat must be applied to make steam. With the increased pressure, you in turn get steam at higher temperatures. Higher temperature steam contains more energy per pound, which is known as Enthalpy.
How do you convert volume to specific volume?
Specific volume equals volume divided by mass. Typically, volume is measured in cubic meters (m3), and mass is measured in kilograms. Specific volume is then calculated as volume divided by mass.
How do you calculate specific volume?
To calculate specific volume you need to know the volume (V) and the mass (m). Specific volume equals volume divided by mass. Typically, volume is measured in cubic meters (m3), and mass is measured in kilograms. Specific volume is then calculated as volume divided by mass.
What is difference between volume and specific volume?
Volume is a thermodynamic property of a substance. Specific volume is the volume of a unit mass of a substance. The difference between volume and specific volume is that volume is an extensive property whereas specific volume is an intensive property.
How do you find specific volume?
Are steam tables in absolute pressure?
Steam tables based on gauge pressure indicate atmospheric pressure as 0, while steam tables based on absolute pressure indicate it as 101.3 kPa (14.7 psi). Also, to distinguish gauge pressure from absolute pressure, a “g” is typically added to the end of the pressure unit, for example kPaG or psig.
What pressure is high-pressure steam?
High-pressure steam boilers create steam at above 15 psi. In practice, industrial high-pressure boilers often operate at hundreds of psi. They also operate at considerably higher temperatures than low-pressure boilers.
What happens to steam at high-pressure?
Therefore, increasing the pressure effectively increases both the enthalpy of water, and the saturation temperature. The relationship between the saturation temperature and the pressure is known as the steam saturation curve (see image below).
What is the volume per mass of steam?
A: The volume per mass of steam varies with temperature and pressure. Since steam can be categorized as saturated and superheated steam, its specific volume also is dependent on its pressure and temperature. You may refer to steam tables
What type of pressure is used in a steam table?
Saturated steam tables can also use two different types of pressure: absolute pressure and gauge pressure. Absolute pressure is zero-referenced against a perfect vacuum. Gauge pressure is zero-referenced against atmospheric pressure (101.3 kPa, or 14.7 psi).
What is the temperature of 250 psi of pure steam?
Example: The temperature of 250 psig pure steam is always 406°F. Heat of Saturated Liquid (Column 4). This is the amount of heat required to raise the temperature of a pound of water from 32°F to the boiling point at the pressure and temperature shown. It is expressed in British thermal units (Btu).
What are the properties of steam?
Their properties are tabulated in so called “Steam Tables”. In these tables the basic and key properties, such as pressure, temperature, enthalpy, density and specific heat, are tabulated along the vapor-liquid saturation curve as a function of both temperature and pressure.
