Thanks for a nicely presented first question.
First you need a model for the equation of state for the tank. Given the initial conditions, develop formulas that yield static pressure, temperature, work, etc as a function of the mass remaining in the tank. (You need at least one fully defined state point for the tank, I'm assuming it's the initial condition).
At 1.6[m/s] the Air resistance is negligible so I would dismiss that term.
However, a word of caution: Rolling resistance Force is not the same as friction force if you are using wheels.
I would point you to the following page for a rough estimation of Rolling resistance.
The other factors that might come into play are negligible compared to what you have ...