An insulated rigid tank initially contains 1.5 Ibm of helium at 80°F and 50 psia. A paddle wheel with a power rating of 0.02 hp is operated within the tank for 30 min. Determine (a) the final...

Extracted text: An insulated rigid tank initially contains 1.5 Ibm of helium at 80°F and 50 psia. A paddle wheel with a power rating of 0.02 hp is operated within the tank for 30 min. Determine (a) the final temperature and (b) the final pressure of the helium gas. Specific heat of helium, c, = 0.753 BTU / lbm°F