T (°F)

ν (ft3/lbm)

∆

∆2

∆3

∆4

700

0.0799

0.002097

-0.000028975

3.93958E-07

-4.63281E-09

720

0.12184

0.000938

-5.3375E-06

2.33333E-08

740

0.1406

0.000725

-3.9375E-06

760

0.15509

0.000567

780

0.16643


ν= 0.0799+0.002097(T-700) -0.000028975(T-700)(T-720)+ 3.93958E-07(T-700)(T-720)(T-740) -4.63281E-09 (T-700)(T-720)(T-740)(T-760)= -1475.79+ 7.8563461 T- 0.0156849 T2+ 1.392E-05 T3- 4.632E-09 T4


T=750 °Fâν=0.1483095 ft3/lbm