Steam Condensation: How Much Steam is Converted to Water at Constant Pressure?

In summary, the conversation discussed the condensation of steam at constant pressure. It was mentioned that an enclosed volume of 1 m³ filled with steam at 100°C and 1 bar pressure was connected to a chamber filled with dry air. The temperature was then lowered to 70°C and the question was raised about the percentage of steam that would be condensed. It was determined that approximately 59.256% of steam would be converted to water based on the pressure difference between 100°C and 70°C.
  • #1
pranj5
386
5
What I want to be clarified in this thread is about condensation of steam at constant pressure. Suppose Suppose an enclosed volume of size 1 m³ and it's filled with steam at 100°C and 1 barA pressure. Now, the container is connected to a chamber filled with dry air in such a way that the pressure inside the chamber can't change. Now, the temperature has been lowered to 70°C. Question is, what % of steam will be condensed then.
At 100°C, the pressure of steam is 101.32 kPa while at 70°C it's 31.15 kPa. Does that mean that {1-(31.15/101.32)}% of steam i.e. approx 59.256% of steam has been converted to water?
 
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  • #2
Yes.
 

1. What is steam condensation?

Steam condensation is the process by which water vapor (steam) transforms into liquid water. This occurs when the temperature of the steam drops below the boiling point, causing it to lose energy and condense into liquid form.

2. How does steam condensation occur?

Steam condensation occurs when the temperature of the steam decreases, causing the water molecules to lose energy and come together to form liquid droplets. This can happen through contact with a cooler surface or by mixing with cooler air.

3. What factors affect steam condensation?

The main factors that affect steam condensation are temperature, pressure, and the presence of impurities in the steam. A lower temperature and pressure will lead to faster condensation, while impurities in the steam can act as nucleation sites and promote condensation.

4. What are the applications of steam condensation?

Steam condensation has many important applications, such as in power generation, refrigeration, and distillation processes. It is also commonly used in everyday appliances like kettles, irons, and humidifiers.

5. How can steam condensation be controlled or prevented?

To control or prevent steam condensation, the temperature and pressure of the steam can be regulated, and impurities can be removed through filtration or purification processes. Additionally, insulating surfaces can help to maintain higher temperatures and prevent excess condensation.

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