Edit question what is the density and uncertainty for ideal gas equation of state if pressure...
Edit question what is the density and uncertainty for ideal gas equation of state if pressure is 2 atmospheres( with uncertainty 25%) and temp is 18 degrees Celsius, with uncertainty 2 degrees Celsius. Gas is nitrogen.
Homework Answers
using ideal gas eqn
PM = dRT
d = PM/RT = 2x10^5 x 28/ 8315 x 291
= 2.31 kg/ m^3
dd = dP + dT = 0.25 + 2/18 = 0.25 + 0.11 = 0.36
uncertainty in density = 0.36 x 2.31 = 0.833 kg/m^3
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