A(n) 0.65 mole quantity of O2 originally at 85◦C is cooled such that it now occupies 4.0 L at 20.◦C. What is the final pressure exerted by the gas? 1. 1.1 atm 2. 6.2 atm 3. 0.27 atm 4. 3.9 atm 5. 0.92 atm 6. Not enough information is given

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.