Question

You have 2ft^3 of oxygen that is initially at 75°F, 200 psia, Then 400 Btu of heat is transferred into the oxygen. Assuming that oxygen can be treated as ideal under these circumstances,

find:

The final volume using ideal gas tables if the process is isobaric.

Answer 1

Given,

T₁ = 75^oF = 535 R

Using Table A-1 (Molar mass, gas constant and critical point properties)

• for Oxygen

R = 0.3353 psia.ft³/lbm.R

M = 31.999 lbm/lbmol

Mass will be;

Using Table A-19E (Ideal gas properties of Oxygen);

• at T₁ = 75^oF = 535 R, by interpolating between 520 R and 537 R;

For isobaric process;

Using Table A-19E,

By ideal gas equation;

...(Answer)