Calculate the specific entropy of steam

Thread starter morry
Start date Nov 1, 2005
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Entropy Specific Steam

In summary, specific entropy is a thermodynamic property that measures the disorder in a substance at a specific temperature and pressure. It is calculated using the steam tables and is typically given in joules per kilogram per Kelvin (J/kg·K) in the SI system. Calculating the specific entropy of steam is important in determining its behavior and properties in industrial and engineering applications. The specific entropy of steam increases with temperature and decreases with pressure due to changes in the energy and organization of its molecules.

Nov 1, 2005

morry

Ok, using steam tables, calculate the specific entropy of steam with dryness fraction 0.63 and pressure of 2MPa.

Can someone suggest how Id go about this?

Thanks.

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Nov 1, 2005

morry

oops, mustve clicked on the create thread button twice. My bad.

Nov 2, 2005

morry

Ok, I think I know how to do this now. Didnt realize that specific entropy was on my tables.

Related to Calculate the specific entropy of steam

1. What is specific entropy?

Specific entropy is a measure of the disorder or randomness in a substance at a specific temperature and pressure. It is a thermodynamic property that relates to the amount of energy required to increase the temperature of a substance while keeping its pressure constant.

2. How is the specific entropy of steam calculated?

The specific entropy of steam is calculated using the steam tables, which provide the specific entropy values for different temperatures and pressures. The specific entropy of steam can be calculated by interpolating between two values in the steam tables or by using the steam tables to find the specific volume and internal energy of the steam, and then using the formula S = U/T, where S is the specific entropy, U is the specific internal energy, and T is the temperature.

3. What are the units of specific entropy?

The units of specific entropy are typically given in joules per kilogram per Kelvin (J/kg·K) in the SI system. In the English system, the units are usually given in BTU per pound per Fahrenheit (BTU/lb·°F).

4. Why is calculating the specific entropy of steam important?

Calculating the specific entropy of steam is important in thermodynamics as it helps to determine the behavior and properties of steam in various industrial and engineering applications. It is also used in the design and operation of steam turbines, power plants, and other steam-based systems.

5. How does the specific entropy of steam change with temperature and pressure?

The specific entropy of steam increases with temperature and decreases with pressure. This is because as the temperature of steam increases, the molecules become more energetic and disordered, resulting in a higher specific entropy value. On the other hand, as the pressure of steam decreases, the molecules become more compact and organized, leading to a lower specific entropy value.