Avessel, divided into two parts by a partition, contains 4 mol of nitrogen gas at 75oc and 30 bar on one side and 2.5 mol of argon gas at 130oc and 20 bar on the other. if the partition is removed and the gases mix adiabatically and completely, what is the change in entropy? assume nitrogen to be an ideal gas with cv=2.5r, and argon to be an ideal gas with cv=1.5r.

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.

Select the correct value for the indicated bond angle in each of the compounds. o−o−oo−o−o angle of o3 90° 109.5° < 109.5° 120° < 120° 180° f−b−ff−b−f angle of bf3 180° < 109.5° < 120° 120° 109.5° 90° f−o−ff−o−f angle of of2 < 120° 120° 90° 109.5° 180° < 109.5° cl−be−clcl−be−cl angle of becl2 90° 109.5° 180° 120° < 109.5° < 120° f−p−ff−p−f angle of pf3 90° 109.5° < 109.5° 180° 120° < 120° h−c−hh−c−h angle of ch4 90° < 109.5° 180° 120° < 120° 109.5°

An atomic nucleus is composed ofa)protons.b)protons and neutrons.c)protons and electrons.d)protons, neutrons, and electrons.