P19_001.PDF

1. We take p 3 to be 80 kPa for both thermometers. According to Fig. 19-6, the nitrogen thermometer gives

373 . 35K for the boiling point of water. Use Eq. 19-5to compute the pressure:

p N =

273 . 16 K p 3 = 373 . 35K

(80 kPa) = 109 . 343 kPa .

273 . 16 K

The hydrogen thermometer gives 373 . 16 K for the boiling point of water and

p H = 373 . 16 K

273 . 16 K

(80 kPa) = 109 . 287 kPa .

The pressure in the nitrogen thermometer is higher than the pressure in the hydrogen thermometer by

0 . 056 kPa.