Describe an experiment to determine the saturation vapour pressure of water in the temperature range 25 degree Celsius to 70 degree Celsius. Sketch the curve you would expect to obtain

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To determine the saturation vapor pressure of water in the temperature range of 25 to 70 degrees Celsius, you can perform the following experiment:

1. Set up a controlled environment: Create a closed chamber equipped with a temperature-controlled system and a pressure gauge. This will allow you to control the temperature and measure the pressure inside the chamber accurately.

2. Calibrate the pressure gauge: Ensure that the pressure gauge is properly calibrated to provide accurate measurements.

3. Begin at the lowest temperature: Set the initial temperature of the chamber to 25 degrees Celsius.

4. Let the system equilibrate: Allow the temperature in the chamber to stabilize, ensuring that the water inside the chamber reaches equilibrium with the surrounding temperature.

5. Measure the pressure: Use the pressure gauge to measure the pressure inside the chamber. This will give you the saturation vapor pressure of water at 25 degrees Celsius.

6. Increase the temperature: Gradually increase the temperature within the chamber while keeping track of the corresponding pressure measurements at each temperature.

7. Repeat steps 4-6: Repeat steps 4-6 for various temperatures within the desired range (25 to 70 degrees Celsius). Increase the temperature in small intervals, such as 5-degree increments, to obtain more data points.

8. Plot the data: Once you have obtained a series of pressure measurements at different temperatures, plot the pressure (y-axis) against the temperature (x-axis) to create a graph or curve.

9. Sketch the curve: Based on the collected data, plot the points on the graph and connect them to form a curve. This curve represents the relationship between the temperature and the saturation vapor pressure of water in the given temperature range.

The curve you would expect to obtain is an upward-sloping curve that starts at a low pressure value at 25 degrees Celsius and gradually increases as the temperature increases. As the temperature rises, the saturation vapor pressure of water increases exponentially, indicating that water evaporates more readily at higher temperatures.

Please note that the actual curve shape may vary slightly due to experimental conditions, but it typically shows an increasing trend as temperature increases.

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