Pressure & Temperature Effects on Water State: 25 bar @ 200°C

In summary, at 25 bar and 200°C, water will be in its supercritical state, with properties of both a liquid and a gas. Pressure affects the boiling point of water, as it increases, so does the boiling point. Temperature generally decreases the density of water, but at high pressures and temperatures, the density can increase due to hydrogen bonding. Water cannot exist as a solid at these conditions, as it requires a critical point of 22.064 MPa and 374.15°C. As pressure and temperature increase, the solubility of substances in water also increases due to increased kinetic energy and molecular motion.
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Colts
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What would the state of water be at if the pressure is 25 bar and the temp is 200 degrees Celsius?
 
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  • #2
You can use a version of Antoine equation, which is valid for high pressures and temperatures. For example use this one, which is valid in the range of 1°C to 374°C and 4.89 mmHg to 162991 mmHg.

Calculate a boiling temperature at 25 bar. It is around 224°C. It is more than 200, so we still have water at 200. Not steam.
 

FAQ: Pressure & Temperature Effects on Water State: 25 bar @ 200°C

What happens to water at 25 bar and 200°C?

At 25 bar and 200°C, water will be in its supercritical state, meaning it will have properties of both a liquid and a gas. It will have a high density and low viscosity, allowing it to dissolve substances easily.

How does pressure affect the boiling point of water?

As pressure increases, the boiling point of water also increases. This is because the higher pressure prevents the water molecules from escaping as easily, requiring a higher temperature to reach the vapor pressure needed for boiling.

What is the impact of temperature on water's density?

Generally, as temperature increases, the density of water decreases. However, at high pressures and temperatures, the density of water can increase due to the formation of hydrogen bonds between molecules.

Can water exist as a solid at 25 bar and 200°C?

No, water cannot exist as a solid at these conditions. The critical point of water, where it can exist in a supercritical state, is at 22.064 MPa (approximately 220 bar) and 374.15°C. At these conditions, water can no longer transition between liquid and solid states.

How do pressure and temperature affect the solubility of substances in water?

As pressure and temperature increase, the solubility of substances in water also increases. This is because the higher pressure and temperature allow water to dissolve more substances by increasing the kinetic energy and molecular motion of water molecules.

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