Gas Laws and Calculations

The video tutorial explains how to use the combined gas law to solve a problem involving a nitrogen tank. Initially, the tank is at 25°C with a pressure of 2550 PSI and contains 212 moles of nitrogen. The tank is moved to a colder environment at -12°C, and 72 moles of gas are removed. The tutorial demonstrates simplifying the combined gas law equation by removing unchanged variables, solving for the final pressure, and carefully converting units. The final pressure is calculated to be 1475 PSI.

What is the combined gas law equation?

• P1 / T1 = P2 / T2

• V1 / T1 = V2 / T2

• P1 V1 / N1 T1 = P2 V2 / N2 T2

• P1 V1 = P2 V2

In the given problem, what is the initial pressure of the nitrogen tank?

• 2550 PSI

• 273 PSI

• 1475 PSI

• 212 PSI

How many moles of nitrogen are removed from the tank in the problem?

• 50 moles

• 72 moles

• 100 moles

• 212 moles

What is the final temperature in Kelvin after converting from -12°C?

• 261°C

• 273 K

• 285 K

• 261 K

What is the initial number of moles of gas in the tank?

• 212 moles

• 140 moles

• 72 moles

• 284 moles

What is the final pressure in the tank after the calculation?

• 1000 PSI

• 1475 PSI

• 2550 PSI

• 2000 PSI