How do you find the specific volume of water?
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.
Does water have a specific volume?
The standard unit of specific volume is cubic meters per kilogram (m3/kg), but other units include ft3/lb, ft3/slug, or mL/g….Table of common specific volumes.
| Substance name | Density | Specific volume |
|---|---|---|
| (kg/m3) | (m3/kg) | |
| Air | 1.225 | 0.816 |
| Ice | 916.7 | 0.00109 |
| Water (liquid) | 1000 | 0.00100 |
Why is the phase diagram of water different?
Notice one key difference between the general phase diagram and the phase diagram for water. The reason is that water is an unusual substance in that its solid state is less dense than the liquid state. Ice floats in liquid water. Therefore, a pressure change has the opposite effect on those two phases.
How do you find pressure from specific volume?
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 of water?
A common unit of measurement for water’s density is gram per milliliter (1 g/ml) or 1 gram per cubic centimeter (1 g/cm3). Actually, the exact density of water is not really 1 g/ml, but rather a bit less (very, very little less), at 0.9998395 g/ml at 4.0° Celsius (39.2° Fahrenheit).
What is PV diagram in thermodynamics?
A pressure–volume diagram (or PV diagram, or volume–pressure loop) is used to describe corresponding changes in volume and pressure in a system. They are commonly used in thermodynamics, cardiovascular physiology, and respiratory physiology.
How do you find a 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 a pressure temperature diagram?
The simplest phase diagrams are pressure–temperature diagrams of a single simple substance, such as water. The axes correspond to the pressure and temperature. The phase diagram shows, in pressure–temperature space, the lines of equilibrium or phase boundaries between the three phases of solid, liquid, and gas.
How are pressure and volume related in a PV diagram?
In addition, the processes plotted on PV diagrams only work for a closed system (in this case the ideal gas), so there is no exchange of matter, but still an exchange of energy. Pressure and volume exhibit a causal relationship, meaning that the change of one variable will cause the change in the other.
What is the relationship between pressure and volume?
The PV diagram models the relationship between pressure (P) and volume (V) for an ideal gas. An ideal gas is one that never condenses regardless of the various changes its state variables (pressure, volume, temperature) undergo.
Which is an ideal gas for a PV diagram?
An ideal gas is one that never condenses regardless of the various changes its state variables (pressure, volume, temperature) undergo. In addition, the processes plotted on PV diagrams only work for a closed system (in this case the ideal gas), so there is no exchange of matter, but still an exchange of energy.
How to draw a P-V diagram of a process?
Find: (a) Draw a P-v diagram of the process. Label the initial state 1 and the final state 2. (b) Calculate the work done on the gas during the process. Assumptions: The piston is frictionless Governing Relations: Property Data: – Quantitative Solution: a) To draw the P-v diagram, we need P and v information at states 1 and 2.