Hi, I\'m having trouble answering the following physics question: Five grams of

Question

Hi,

I'm having trouble answering the following physics question:

Five grams of nitrogen gas at an initial pressure of 3.0 atm and at 20? C undergo an isobaric expansion until the volume has tripled.

What is the gas volume after the expansion?

What is the gas temperature after the expansion? The gas pressure is then decreased at constant volume until the original temperature is reached.

What is the gas pressure after the decrease? Finally, the gas is isothermally compressed until it returns to its initial volume.

What is the final gas pressure?

Explanation / Answer

As u have stated the expansion as isobaric, the pressure remains const.
Let the initial volume b v.
also as the volume has tripled final volume = 3v
pv/RT =p(3v)/RT'
Now u can find T'
apply ideal gas equation then v get pv = nRT
therefore v = 1.4318 litres
thus final volume = 3v = 4.2955 litres

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