Volume vapour calculation for jet fuel a1

[kadhar]

1. Homework Statement
is there any formulae for obtain the volume vapour % V/V. we have a jet fuel a1 10 liters in the closed chamber.the temperature measured inside is 41 degree. we want to know how much vapour it can generate at the particular temperature. we have the following data
1. fuel ; jet fuel a1
qty: 10 liters
chamber size: 27 cum
temperature inside chamber: 41 degree
data given ; Vapour pressure <0.1kpa @ 20 degree c
flashpoint : 30 degree
flammable limits upper: 6%V/V

can anyone help us to solve the problem to calculate the partial pressure in the chamber by that can we derive volume vapour V/V
2. Homework Equations [/b

The Attempt at a Solution

 

[Valkarie]

The formula for the partial pressure of a gas is given by:P = (V/V) * P0where V/V is the volume fraction of the gas in the chamber and P0 is the vapour pressure of the fuel at 20°C. Since the flashpoint of the fuel is 30°C and the temperature inside the chamber is 41°C, the fuel will be vaporizing in the chamber. The vapor pressure at 41°C can be calculated using the Antoine equation which is given by:log10(P) = A – (B/(T+C))where P is the vapor pressure at the temperature T, A, B and C are constants that depend on the type of fuel. The constants for jet fuel A1 can be found in literature. Once the vapor pressure at the chamber temperature is calculated, then the partial pressure in the chamber can be calculated using the formula given above. Finally, the volume fraction of the vapor can be calculated using the flammable limits given in the problem statement.

 

[Mene]

There is a formula that can be used to calculate the volume vapor percentage (V/V) for a given fuel, temperature, and pressure. This formula is known as the Ideal Gas Law, which states that the pressure (P) of a gas is equal to its molar volume (V) multiplied by its temperature (T) and the gas constant (R). This can be represented as P = nRT, where n is the number of moles of the gas and R is a constant value. However, in order to use this formula, we would need to know the molar volume of the jet fuel a1, which is not provided in the given data.

Another approach would be to use the Antoine equation, which relates the vapor pressure of a substance to its temperature. This equation is typically used for pure substances, but it can be adapted for mixtures by using the Antoine coefficients for each component. Unfortunately, the data provided does not include the Antoine coefficients for jet fuel a1.

Therefore, it is not possible to accurately calculate the volume vapor percentage (V/V) for the given scenario without more information. It may be helpful to consult a fuel expert or conduct further research on the specific properties of jet fuel a1 in order to obtain the necessary data for the calculation.