6-55. The

P0T

relationship for ammonia at low pressures is reasonably represented by\ the equation

v=R(T)/(P)=0.0030-(0.34)/((0.01T)^(3))-(60)/((0.01T)^(11))

, where

P

is in\ atmospheres,

T

is in kelvins, and

v

is in

(m^(3))/(k)g

. If the value of

c_(p)

at 5 bars and\

37\\\\deg C

is

2.45k(J)/(k)g*K

, estimate the value of the Joule-Thomson coefficient at this\ state, in K/bar.

55. The PvT relationship for ammonia at low pressures is reasonably represented by the equation v=RT/P0.00300.34/(0.01T)360/(0.01T)11, where P is in atmospheres, T is in kelvins, and v is in m3/kg. If the value of cp at 5 bars and 37C is 2.45kJ/kgK, estimate the value of the Joule-Thomson coefficient at this state, in K/bar