Download
1 / 1
10 likes | 72 Views
Ex 18.75. A magician friend asks for your help in designing an illusion involving a "frozen" balloon containing 5.0 L of air at 0°C out of a freezer & heat it with a small explosive charge. He needs to know how much heat energy will be required to raise the temperature to 20°C.
E N D
Ex 18.75 A magician friend asks for your help in designing an illusion involving a "frozen" balloon containing 5.0 L of air at 0°C out of a freezer & heat it with a small explosive charge. He needs to know how much heat energy will be required to raise the temperature to 20°C. The molar specific heat of air at constant volume is 2.5 R. Neglecting the tension in the balloon's latex, what do you tell him? 0 1: Exposive raises T of gas isovolumically. 1 2: Gas expand adiabatically. Since surface tension of balloon is negligible, P0 = P2 = 1 atm. Other lines are isotherms. Known: P0 , V0 , T0 , P2 , T2 , Cv .
