Is it possible to calculate the amount of water (mol, mass...) in a gas, in a heat exchanger, if I know the partial pressure of the water? The stream through the tubes is mainly benzene and hydrocarbons. Partial pressure of the water and the temperature is assumed constant.
I first tried to use the ideal gas law with the compressibility factor, but most people told me this equation is meant for closed systems (like in a tank) and not open systems like the one described. (If I'm wrong and it can be used, give me a good reason why so I understand).
Extra info: I need to calculate how much water is in the gas that will cause a relative humidity of 10 %. After taking the coldest temperature in the heat exchanger (because the RH would be highest here) as a constant, with the formula of relative humidity I can calculate the max partial pressure of water in the tubes thats would cause RH of 10 %. But I need the amount (mass, mol) that would be in the gas.
If you have any more questions, please ask.