The question is(adsbygoogle = window.adsbygoogle || []).push({});

a volume of 2.2m^3 of air at inital conditions of 1.2bar and 303K undergoes the following process to complete a cycle :

i)isothermal compresssion from state 1 through a volumetric compression ration of 6 to state 2

ii) isobaric expansion from state 2 back to the initial volume thus reaching state 3

iii) isochoric cooling from state 3 back to the original pressure to reach state 1

Q1) Find the mass of air present

so i use the formula PV=nRT

P=1.2bar

V=2.2M^3

n=?

R=6

T=303K

so i need to find N so i got 2.64 = 1818N

which N is 1.452x10^-3

which is total not the mass of the air , please help

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Getting strange answer , lease help

**Physics Forums | Science Articles, Homework Help, Discussion**