Question: A spherical elastic balloon contains nitrogen (N2) at 20oC, 500 kPa. The initial volume is 0.5 m3. The balloon material is such that the pressure

A spherical elastic balloon contains nitrogen (N2) at 20oC, 500 kPa. The initial volume is 0.5 m3. The balloon material is such that the pressure inside is proportional to the balloon diameter. Heat is now transferred to the balloon until its volume reaches 1.0 m3, at which point the process stops.
a) Can the nitrogen be assumed to behave as an ideal gas throughout this process?
b) Calculate the heat transferred to the nitrogen.

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