The following table lists temperatures and specific volumes of ammonia vapor at two pressures P= 50 psi P= 60 psi
T (°F) v(ft3/lbm) T (°F) v (ft3/lbm)
100 6.836 100 5.659
120 7.110 120 5.891
140 7.280 140 6.120
Data encountered in solving problems often do not fall exactly on the grid of values provided by property tables and linear interpolation between the adjacent table entries becomes necessary. Using the data provided here, determine by linear interpolation
a) The specific volume at T = 120°F, P = 57 psi in ft3/lbm
b) The temperature at P = 60 psi, v= 5.96 ft3/lbm, in °F
c) The specific volume at T = 133°F, P = 56 psi in ft3/lb