1. Since the gas in your graduated cylinder is a mixture of butane and water vapor, you must determine the partial pressure of the butane, Pbutane, alone. To do this, consult a reference and record the partial pressure of the water vapor, Pwater, at the temperature you recorded. Use the following formula to compute the partial pressure of the butane.
I don't see a formula but it is this.
Ptotal = pbutane + pH2O
Look in your text for a table of vapor pressures for water or look on google to that and record that as pH2O. The total pressure will be the atmospheric pressure at the time you did the experiment. Substitute and calculate pbutane.
get the listed partial pressure of water vapor at your temperature, for a chart.
Pressurebutant=totalpressue-PartialPressureH2O
To compute the partial pressure of butane, you need to consult a reference to find the partial pressure of water vapor at the recorded temperature. Once you have that information, you can use the formula:
Pbutane = Ptotal - Pwater
where Ptotal is the total pressure in the graduated cylinder and Pwater is the partial pressure of water vapor.
1. Find a reliable reference or source that provides the partial pressure of water vapor at the recorded temperature.
2. Record the partial pressure of water vapor, Pwater, from the reference.
3. Subtract the partial pressure of water vapor, Pwater, from the total pressure in the graduated cylinder, Ptotal, to calculate the partial pressure of butane, Pbutane.
Note: Make sure that the units of pressure are consistent (e.g., mmHg, atm) before performing any calculations.
To compute the partial pressure of butane, you need to follow these steps:
1. Consult a reference: Find a reliable source, such as a chemistry handbook or an online database, and look up the partial pressure of water vapor, Pwater, at the temperature you recorded. Make sure the reference provides information specific to the temperature you measured.
2. Record the partial pressure of water vapor, Pwater: Once you have found the partial pressure of water vapor, record the value in units of pressure (e.g., atmospheres or pascals).
3. Use the formula: To compute the partial pressure of butane, you can utilize Dalton's law of partial pressures. According to Dalton's law, the total pressure of a gas mixture is equal to the sum of the partial pressures of each component gas. The formula to compute the partial pressure of butane is as follows:
Pbutane = Ptotal - Pwater
- Pbutane represents the partial pressure of butane (which you are trying to determine).
- Ptotal represents the total pressure of the gas mixture in the graduated cylinder.
- Pwater represents the partial pressure of water vapor (obtained from the reference).
4. Input values: Substitute the known values into the formula. Use the total pressure of the gas mixture that you measured in the graduated cylinder. Also, use the partial pressure of water vapor that you obtained from the reference.
5. Perform the calculation: Subtract the partial pressure of water vapor from the total pressure of the gas mixture to obtain the partial pressure of butane. Make sure to use the appropriate units for pressure throughout the calculation.
By following these steps and using the formula provided, you can determine the partial pressure of butane in the gas mixture in your graduated cylinder.