Aclosed, rigid tank fitted with a paddle wheel contains 2.0 kg of air, initially at 200oc, 1 bar. during an interval of 10 minutes, the paddle wheel transfers energy to the air at a rate of 1 kw. during this time interval, the air also receives energy by heat transfer at a rate of 0.5 kw. these are the only energy transfers. assume the ideal gas model for the air, and no overall changes in kinetic or potential energy. do not assume specific heats are constant. determine the change in specific internal energy for the air, in kj/kg, and the final temperature of the air, in oc.