what would an open manometer look like in which the pressure of the gas sample is 34.5 kPa higher than the atmosphere?
An open manometer is a device used to measure the pressure of a gas sample relative to the atmospheric pressure. It consists of a U-shaped glass tube filled with a liquid, typically mercury, and has one end open to the atmosphere. The other end is connected to the gas source.
In your case, where the pressure of the gas sample is 34.5 kPa higher than the atmosphere, the liquid in the manometer will be displaced due to the pressure difference. Here's how you can visualize it:
1. Draw a U-shaped glass tube vertically.
2. Fill the tube with mercury or any other suitable liquid.
3. Label one side of the U-shaped tube as "Gas Sample" and the other side as "Atmosphere."
4. Mark the level of the liquid on both sides of the tube at the start (equal levels).
5. On the "Gas Sample" side, draw an arrow pointing upward to represent the higher pressure.
6. On the "Atmosphere" side, draw an arrow pointing downward to represent the lower pressure.
7. Measure and label the difference in height between the two liquid levels. In this case, it would be 34.5 kPa.
So, the open manometer will show a higher liquid level on the "Gas Sample" side, indicating that the pressure of the gas is 34.5 kPa higher than the atmospheric pressure.