What is the value of specific volume?
Specific volume is a property of materials, defined as the number of cubic meters occupied by one kilogram of a particular substance. The standard unit is the meter cubed per kilogram (m 3 /kg or m 3 · kg -1 ).
What is specific volume of fluid?
The specific volume is the reciprocal of the density of the material, which is the mass per unit volume: r = (1/v) = (m/V). The "Specific Gravity" of a substance is the ratio of its mass to that of an equal volume of water at the same temperature and pressure.
How do you find the specific volume of an ideal gas?
If one sets out to determine the specific volume of an ideal gas, such as super heated steam, using the equation ν = RT/P, where pressure is 2500 lbf/in2, R is 0.596, temperature is 1960 °R. In that case, the specific volume would equal 0.4672 in3/lb.
Is specific volume the same as volume?
Summary – Volume vs 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.
Why do we calculate specific volume?
Specific volume is most often used in engineering and in thermodynamics calculations for physics and chemistry. It is used to make predictions about the behavior of gases when conditions change.
How do you find a specific volume in a psychrometric chart?
Calculate specific volume
- Find the point of 250C in the dry bulb axis. …
- Then, find the point of 200C in the wet bulb axis. …
- Mark the interception point of above two lines.
- Identify the constant specific volume lines nearest to the interception point (blue colour).
How do you find the specific volume of water?
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.
Jan 16, 2020
How do you find the specific volume of a saturated liquid?
From the appropriate saturation table, at the given value of pressure or temperature we can find the values of vf and vg then use equation (5), v = vf + x(vg – vf), to find the specific volume.
What is specific volume HVAC?
SPECIFIC VOLUME – The volume of a substance per unit of mass; i.e., standard air 13.33 cubic feet per pound.
How do you find specific humidity?
Specific Humidity Calculator
- Formula. SH = (.622 * P / ( P – Pw ) ) * 100.
- Patrial Pressure of Water Vapor.
- Total Pressure.
Jan 18, 2022
What is specific volume of steam?
Specific volume of steam: Volume occupied in m3 by 1 kg of steam. Mass density (or Density) of the steam: Specific mass of the steam in a volume of 1 m3. Specific enthalpy.
How do you find the specific volume of a compressed liquid?
From the appropriate saturation table, at the given value of pressure or temperature we can find the values of vf and vg then use equation (5), v = vf + x(vg – vf), to find the specific volume.
How do you calculate specific volume of a steam table?
2:175:56How to Use Steam Tables – YouTubeYouTube
What is specific volume of refrigerant?
The specific volume is 0.6575 ft3/lb (1 ÷ 0.6575 = 1.52). Thus, the volume value in Column 5 is the reciprocal of the density value of the saturated vapor.
How do you calculate specific volume in a psychrometric chart?
Calculate specific volume
- Find the point of 250C in the dry bulb axis. …
- Then, find the point of 200C in the wet bulb axis. …
- Mark the interception point of above two lines.
- Identify the constant specific volume lines nearest to the interception point (blue colour).
What is specific and relative humidity?
Relative humidity, often expressed as a percentage, indicates a present state of absolute humidity relative to a maximum humidity given the same temperature. Specific humidity is the ratio of water vapor mass to total moist air parcel mass. Humidity plays an important role for surface life.
How do you calculate relative humidity from DBT and WBT?
Relative humidity can be found by subtracting the temperature on the wet-bulb thermometer from the temperature on the dry-bulb thermometer and using a relative humidity chart.
How do you find a specific volume from a property table?
From the appropriate saturation table, at the given value of pressure or temperature we can find the values of vf and vg then use equation (5), v = vf + x(vg – vf), to find the specific volume. (We could use similar equations to find all other properties.)
How do you calculate specific volume of a wet steam?
Specific Volume (ν) of Wet Steam X = Dryness (% / 100) νf = Specific Volume of Saturated Water.
What is VF and VG in steam table?
vf = Specific volume of saturated water (liquid). vg = Specific volume of saturated steam (gas).
What is specific molar volume?
At standard Temperature and Pressure (STP) the molar volume (Vm) is the volume occupied by one mole of a chemical element or a chemical compound. It can be calculated by dividing the molar mass (M) by mass density (ρ). Molar gas volume is one mole of any gas at a specific temperature and pressure has a fixed volume.
How do you calculate specific humidity?
Specific Humidity Calculator
- Formula. SH = (.622 * P / ( P – Pw ) ) * 100.
- Patrial Pressure of Water Vapor.
- Total Pressure.
Jan 18, 2022
How do you measure specific humidity?
One way to measure relative humidity is to use a sling psychrometer, a device made of two thermometers, One thermometer measures the temperature of the dry air (dry-bulb thermometer) and the other measures the temperature of the air as evaporation occurs (wet-bulb thermometer).
How do you calculate wet bulb and dry bulb temperature?
Wet Bulb temperature can be measured by using a thermometer with the bulb wrapped in wet muslin. The adiabatic evaporation of water from the thermometer and the cooling effect is indicated by a "wet bulb temperature" lower than the "dry bulb temperature" in the air.
What is the specific volume of water in cm3 kg?
The SI standard is really kg / m3. Water as the reference with its highest density at 3.98 °C is ρ = 1 g/cm3. The correct SI unit is ρ = 1000 kg/m3. 1 m3 = 1,000,000 cm3.
How do you calculate specific volume of superheated vapor?
1:543:31Specific Volume of Superheated Steam | Thermodynamics – YouTubeYouTube
How do you calculate specific volume in steam?
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 r in pV nRT?
The ideal gas law is: pV = nRT, where n is the number of moles, and R is universal gas constant. The value of R depends on the units involved, but is usually stated with S.I. units as: R = 8.314 J/mol·K.
What is the volume of 17g of nh3 gas at STP?
The volume of 17 g of NH3 gas at STP is 22.4 L.
What do you mean by specific humidity?
SPECIFIC HUMIDITY refers to the weight (amount) of water vapor contained in a unit weight (amount) of air (expressed as grams of water vapor per kilogram of air). Absolute and specific humidity are quite similar in concept.