# All Questions

Tagged with
8 questions
Filter by
Sorted by
Tagged with
49 views

### Ideal gas law, theory vs reality

I am trying to get an idea of the amount of hydrogen that I can store in some pressurized steel tanks underground. Based on the ideal gas law PV=nRT I did a simple calculation pressure = 200bar ...
70 views

### Classic Thermodynamics: Ideal gas question

The question is in the attached picture. I know how to solve the first part of the problem, but the second part confused me a lot. Now when the oven (system) is unsealed, doesn’t make that an open ...
23 views

### Equation for temperature of gas at Joule-Thompson Inversion State

Assume that a gas obeys the following equation of state: $\nu = {\frac{RT}{P}}-{\frac{a}{T}} + b$ Where $a , b$ are constant. Derive an equation for the temperature at the Joule-Thompson ...
337 views

### Determining gas properties in a steam and air gas mixture

I have a gas mixture (steam and air) contained in a tank. I know the tank pressure ($P$), temperature ($T$) and the massic air fraction ($x_a$). I would like to determine the density of both gases ...
69 views

### Thermodynamic, ideal gas problem

I already know solution, I just want to understand something in part b. A vertical cylinder fitted with a piston contains air initially at 120kPa and 100 celcius. The piston is restrained by a set of ...
52 views

### Roskam Book equation of dry air density is not clear. I need explanation

Preface: Roskam in book "Airplane Aerodynamics and Performance" explains (in paragraph "1.1 ATMOSPHERIC FUNDAMENTALS"): To determne how water vapor affects air density, consider a given volume ...