Answer to Question #144546 in General Chemistry for JM

Question

In order to receive an intra-venous injection of medication into the vein, a plastic bag containing medication is hung from a height. If the average gauge pressure in the vein is
11 kPa and the density of the medication in the form of fluid is 1020 kg/m3, what is the minimum height h of the bag?

Answer 1

 P_atm+ ½ρv² + ρgh = P_inject + ½ρv_inject² + ρgh_inject.    Let h_lower be the zero point

P_atm +  0 + ρgh = 11000 +    0   + ρg(0)     . velocity is very low at both points

101325  + ρgh = 11000       

h = 90325/ ρg

h = 90325/ 1020 (9.8)

h = 88.55 m