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.

What is PT diagram in thermodynamics?

A P-T diagram is the most common way to show the phases of a substance. Figure 9 is the P-T diagram for pure water. A P-T diagram can be constructed for any puresubstance. The line that separates the solid and vapor phases is called the sublimation line.

What is the relation between pressure and temperature in thermodynamics?

Temperature and pressure are directly proportional to each other. This means that as the temperature decreases, the pressure also decreases, and as the temperature increases, the pressure increases.

How PV diagram is different from PT diagram?

On a P-v diagram, it forms the triple line and on a T-v diagram, it forms only a point called the triple point. The P-T diagram is called the phase diagram because three phases are separated from each other by three lines (sublimation, melting, and vaporization).

Why are temperature and pressure directly related?

The pressure law states that for a constant volume of gas in a sealed container the temperature of the gas is directly proportional to its pressure. This can be easily understood by visualising the particles of gas in the container moving with a greater energy when the temperature is increased.

How are pressure volume and temperature related?

The pressure of a gas is inversely proportional to its volume when temperature is constant. The product of pressure and volume is constant when temperature is constant. This relationship is known as Boyle’s law or Mariotte’s law .

What is triple point in phase diagram?

phase diagram …the three curves, called the triple point, represents the unique conditions under which all three phases exist in equilibrium together. A phase diagram for two components usually shows melting curves on a temperature-composition diagram.