describe an experiment to determine the s.v.p of water in the temperature range 25°c-70°c.sketch the curve u would expect to obtion
It would help if you proofread your questions before you posted them, e.g. obtion.
Cannot sketch curves on these posts.
By the way, what is "s.v.p"?
To determine the saturation vapor pressure (SVP) of water in the temperature range of 25°C to 70°C, you can conduct the following experiment:
1. Set up a controlled environment: Create a closed chamber or container that can hold the water sample. Ensure it is well-insulated to minimize heat exchange with the surroundings.
2. Position a pressure sensor: Place a pressure sensor inside the chamber connected to a data logger. Make sure the sensor is accurate and can measure small pressure changes.
3. Prepare a water sample: Take distilled water and remove any impurities. Fill a small container with the water, making sure it is well-sealed to prevent evaporation.
4. Start the experiment: Place the container with the water sample into the chamber. Ensure that the temperature is set at 25°C initially.
5. Allow the system to equilibrate: Let the system settle for some time, allowing the temperature and pressure inside the chamber to stabilize.
6. Record the pressure: Once the system has reached equilibrium, record the pressure indicated by the pressure sensor. This pressure corresponds to the saturation vapor pressure at 25°C.
7. Gradually increase the temperature: Adjust the temperature inside the chamber to 30°C and wait for the system to reach equilibrium. Record the pressure indicated by the pressure sensor. Repeat this step for temperatures of 35°C, 40°C, and so on, until you reach 70°C.
8. Plot your results: Using the temperature values and the corresponding pressure measurements, create a graph with temperature on the x-axis and pressure on the y-axis. This graph will show the relationship between temperature and saturation vapor pressure of water at the given range.
The expected curve on the graph should resemble an exponential increase, where the saturation vapor pressure steadily increases with temperature. As the temperature rises, the water molecules gain more energy and can escape into the gas phase more readily, leading to higher vapor pressure. The curve should display a steeper slope at higher temperatures, indicating the greater increase in pressure per unit change in temperature.
Note: The exact curve obtained will depend on various factors, such as atmospheric pressure and the specific conditions of the experiment, but it should demonstrate the general trend of increasing SVP with temperature.
To determine the saturated vapor pressure (SVP) of water in the temperature range of 25°C to 70°C, you can conduct an experiment using a setup called an "isothermal measurement apparatus." Here's how you can perform this experiment:
1. Set up the isothermal measurement apparatus: This apparatus usually consists of a closed container filled with a known volume of water and a pressure monitoring device, such as a manometer or pressure gauge.
2. Place the closed container in a temperature-controlled environment: Ensure that the temperature of the environment is stable and can be controlled precisely within the desired temperature range (25°C to 70°C).
3. Heat the water gradually: Start heating the closed container and increase the temperature slowly, ensuring it stays within the desired range. Allow the system to equilibrate for some time at each temperature point to reach saturated vapor-liquid equilibrium.
4. Monitor the pressure: Continuously monitor the pressure inside the closed container as the temperature increases. This can be done using a manometer or pressure gauge connected to the container. Note down the pressure reading at each temperature point.
5. Repeat the measurements: Keep repeating the experiment at different temperatures within the specified range, increasing the temperature incrementally, and recording the corresponding pressure values.
6. Plot the temperature versus pressure data: Once you have collected all the data, plot a graph with temperature on the x-axis and pressure on the y-axis. You should observe that as the temperature increases, the pressure also increases.
7. Analyze the graph: The curve obtained should show an exponential or logarithmic relationship between temperature and pressure. This curve represents the saturation vapor pressure of water in the given temperature range. It will be higher at higher temperatures and lower at lower temperatures.
As for sketching the curve, it will be difficult for me to provide a visual representation here, but you can expect a curve that starts at a relatively low value of vapor pressure at 25°C and progressively increases to a higher value at 70°C. The curve will likely exhibit a steeper slope as the temperature increases.
Note: It is important to follow standard safety protocols while conducting experiments involving heating and pressure. Consult relevant literature or seek guidance from professionals in carrying out this experiment.