Posted by GRISSELL on Saturday, March 3, 2012 at 10:22pm.
Does the temperature stay the same? Or is this an isentropic (adiabatic) expansion? They need to tell you.
All you know is that pressure is decreased by a factor
R2/P1 = 7800/10130 = 0.770
If the process is adiabatic, they need to tell you what the gas is. (The "gamma" specific heat ratio is needed)
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