Air Properties - Imperial Units

Thermodynamic properties of air at low pressures - imperial units. Calculate and lookup enthalpy, internal energy, and relative pressure based on temperature.

Temperature (R)	Enthalpy h (Btu/lbm)	Relative Pressure pr	Internal Energy u (Btu/lbm)
100	-360	23.7	0.0038
200	-260	47.7	0.0432
300	-160	71.6	0.178
400	-60	95.5	0.486
500	40	119.5	1.059
600	140	143.5	2
700	240	167.6	3.45
800	340	191.8	5.53
900	440	216.3	8.41
1000	540	241	12.3
1200	740	291.3	24
1400	940	342.9	42.9
1600	1140	395.7	71.7
1800	1340	449.7	114
2000	1540	504.7	174
2500	2040	645.8	436
3000	2540	790.7	941

Calculator

Inputs

Temperature (R)

Results

Enthalpy h-- Btu/lbm

Relative Pressure pr--

Internal Energy u-- Btu/lbm