Consider a mass of air (perfect gas), m = 10 kg cooled isochorically (constant volume) from the initial state(P1= 1MPa, T1= 200℃). If the temperature of the surroundingsisT2= 27℃. Determine the entropy change of theair, the surroundings, and the universe.

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.