For an isovolumetric process where Pressure1 is greater than Pressure2 and T1 is equal to 300 K. Are Q,W and deltaE positive, negative, or zero.

For an isovolumetric process where P2 Is greater than P1 and T2 is equal to 300 K. Are Q,W and deltaE positive, negative, or zero.

You are trying to life a treasure chest weighing 3969 kg from the bottom of a lake. The chest measures .5m by .3m by .3m. The chest has a density of 10000 kg/m3. The lake is 50m deep. And the density of the water is 1000kg/m. You attach a large, spherical inflatable bag to it. Assume the inflated bag has negligible weight. What is the minimum radius the bag should be inflated so that the chest doesn’t sink.