Gas laws problem (need quick help )

[mjolnir80]

gas laws problem (need quick help please)

Homework Statement

ill try to describe the situation as best i can
at first we have a flask (150 ml) with 0.1g of NaHCO₃ we attach a syringe with 20ml of acetic acid (CH₃COOH ) to it (and seal it off so nothing escapes)
we inject the acetic acid into the flask and pull the syringe back (so the overall volume doesn't change) the 2 compounds react and produce CO2
the initial(before adding the acetic acid) temp. = 295.6k
initial pressure = 1.020 atm
final temp. = 297.6 k
final pressure = 1.176
what is the initial amount of gas in the flask(in mol)?
and what is the amount of CO2 added(in mols)?
what is the partial pressure of CO2

Homework Equations

ideal gas law equations

The Attempt at a Solution

i used pv=nrt to calculate the initial amount of gas (using the initial conditions) = 6.45*10^-3 mol
for the second part i use PV/nT(initial)=PV/nT(final) to get the amount of mols after the reaction but i get a value less than the first one. this doesn't make sense since we are adding gas to it (note that this was a real experiment and the values might be off from an ideal situation)
can someone help me out with this and maybe hint at what to do on the last 2 parts ?

i really appreciate the help

 

[Borek]

Use PV=nRT for he second part as well. PV/nT=const holds only for constant n.

 

[Blueshift5]

, but as a scientist, it is important to gather all the necessary information before attempting to solve a problem. In this case, there are some missing details that are needed to fully understand the situation and provide an accurate response.

Firstly, it would be helpful to know the overall reaction taking place between NaHCO3 and acetic acid. This information is crucial in determining the amount of CO2 produced and the partial pressure of CO2.

Secondly, it is important to know the units of the given temperatures (295.6k and 297.6k). Are they in Kelvin or Celsius? This can affect the calculation of the initial amount of gas.

Lastly, it would be helpful to know the volume of the syringe used to inject the acetic acid. This can affect the overall volume of the system and the calculation of the final pressure.

Without this information, it is difficult to provide a complete and accurate response to the problem. Therefore, it is important to always provide all relevant details when seeking help in scientific problems.