Deposition releases energy and is an exothermic phase change.

This phenomenon is known as condensation. Cold water inside the water tries to cool down The water vapor in air which comes in contact with wall of glass and due to low temperature the vapor liquid and appears as water droplets on the outside of glass.

Condensation is the process of water vapor turning back into liquid water, with the best example being those big, fluffy clouds floating over your head. And when the water droplets in clouds combine, they become heavy enough to form raindrops to rain down onto your head.

Find the latent heat of fusion, Lf, according to Lf = q ÷ m by dividing the heat, q, absorbed by the ice, as determined in step 3, by the mass of ice, m, determined in step 4. In this case, Lf = q / m = 2293 J ÷ 7.0 g = 328 J/g. Compare your experimental result to the accepted value of 333.5 J/g.

In contrast, boiling only occurs at the boiling point of the liquid. An example of condensation can be seen when drops of water form on the outside of a glass of ice water. The dew that forms on grass overnight is another example of condensation. Condensation happens when molecules in a gas cool down.

Gaseous water, or water vapor, isn’t something you can see, but it’s part of the air around you. Under normal circumstances, water vapor enters the atmosphere through evaporation and leaves by condensation (rain, snow, etc.). Water vapor also enters the atmosphere by a process called sublimation.

Water vapor is water as a gas, where individual water molecules are in the air, separate from each other. Steam is what you see above a boiling kettle. Steam is hot water in droplets almost big enough to see – but you can see the cloud of droplets.

Dry steam is saturated steam that has been very slightly superheated. If wet steam is heated further, the droplets evaporate, and at a high enough temperature (which depends on the pressure) all of the water evaporates, the system is in vapor–liquid equilibrium, and it becomes saturated steam.

Advantages of using superheated steam to drive turbines: To improve thermal efficiency and work capability, e.g. to achieve larger changes in specific volume from the superheated state to lower pressures, even vacuum.

Saturated (dry) steam results when water is heated to the boiling point (sensible heating) and then vaporized with additional heat (latent heating). If this steam is then further heated above the saturation point, it becomes superheated steam (sensible heating).

• Steam can be superheated without applying high pressure.
• Compared to heated air, superheated steam has a high thermal capacity per unit volume, offering extremely high thermal conductivity.
• Compared to hot air, superheated steam has much more powerful drying capability as it is vapor with high thermal conductivity.

100 °C

Another very important reason for using superheated steam in turbines is to improve thermal efficiency. The Carnot cycle, where the change in temperature of the steam between the inlet and outlet is compared to the inlet temperature.

Once the water is heated to boiling point, it is vaporized and turned into saturated steam. When saturated steam is heated above boiling point, dry steam is created and all traces of moisture are erased. This is called superheated steam.

In fact, superheated water-derived steam has so much energy stored within it that it can actually be used to start fires!

Steam engines were used in all sorts of applications including factories, mines, locomotives, and steamboats. How does the steam engine work? Steam engines use hot steam from boiling water to drive a piston (or pistons) back and forth. The movement of the piston was then used to power a machine or turn a wheel.

A steam power plant consists of a boiler, steam turbine and generator, and other auxiliaries. The boiler generates steam at high pressure and high temperature. The steam turbine converts the heat energy of steam into mechanical energy. The generator then converts the mechanical energy into electric power.

Steam engines and turbines operate on the Rankine cycle which has a maximum Carnot efficiency of 63% for practical engines, with steam turbine power plants able to achieve efficiency in the mid 40% range.

In this regard, diesel generators score high. While they are a considerably more expensive alternative in comparison to natural gas generators, since the price of diesel is more than that of gas, diesel has a higher energy density.

A 20kW generator will run most house receptacles, lights, and up to a 5-ton central air conditioner. You have a second air conditioner and heating system for the upstairs, but this area of the home is not important to you while operating on generator power.