The mass of air in the pressurised air tank

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The discussion revolves around calculating the temperature and mass of air in a pressurized tank supplying an air engine. The initial pressure is 300 bar and temperature is 60°C, with the pressure dropping to 270 bar when the engine starts. Participants emphasize the importance of using consistent units and proper arithmetic in applying the ideal gas law, which states that PV = nRT. A common error noted is the miscalculation of the mass due to incorrect handling of units and arithmetic operations. Ultimately, the correct mass of air is derived from the number of moles calculated using the ideal gas law, leading to a final mass of approximately 87.84 kg.
  • #31
It's just the picture I have makes it look fairly small, but with the equations I've done it has to be the correct answer.
Sorry it's taken so long but in my notes there's no examples with different values to compare and my tutor isn't easy to get hold of.
Thanks again.
 
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  • #32
Gregs6799 said:
It's just the picture I have makes it look fairly small, but with the equations I've done it has to be the correct answer.
Sorry it's taken so long but in my notes there's no examples with different values to compare and my tutor isn't easy to get hold of.
Thanks again.
Most of your difficulty has not been with the physics of the problem. It has been with your difficulty with mathematics.
 

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