Gas Law Problem: Calculating Final Pressure of Combined Propane Tanks

What is the final pressure of the combined propane tanks?

Given data: A 35 ft3 rigid tank has propane at 15 psia 540 R and connected by a valve to another tank of 20 ft3 with propane at 40 psia 720 R. The two tanks come to a uniform state at 600 R.

Final Answer:

The final pressure of the combined propane tanks can be calculated by applying the ideal gas law.

To calculate the final pressure of the combined propane tanks in this scenario, we need to apply the ideal gas law formula which states PV = nRT.

First, we calculate the total initial number of moles (n1 and n2) in each tank using the given volumes, pressures, and temperatures.

Then, we calculate the total volume (V = V1 + V2) and use the final temperature (T) and total number of moles (n = n1 + n2) to solve for the final pressure (P).

It is important to ensure that the units used in the calculations are consistent to obtain an accurate final pressure value.