Write the most appropriate entropy balance(s) for this process. Clearly identify the system(s) pertaining to your entropy balance(s).

Write the most appropriate entropy balance(s) for this process. Clearly identify the system(s) pertaining to your entropy balance(s)..

Many action movies show gas cylinders that have their caps knocked off. The tanks go flying around wreaking havoc (only on the bad guys, of course). How much velocity could a tank like that really generate? For an upper bound, consider a tank traveling horizontally on a frictionless surface with an isentropic nozzle taking the place of the cap that has been knocked off. Suppose the cylinder weighs 70 kg and holds 50 L of Heat 100bar, 300 K. (a) Write the most appropriate energy balance(s) for this process. Clearly identify the system(s) pertaining to your energy balance(s). Explain your reasoning briefly. (b) Write the most appropriate entropy balance(s) for this process. Clearly identify the system(s) pertaining to your entropy balance(s). Explain your reasoning briefly. (c) Solve for the total kinetic energy (MJ) developed by the tank and its velocity.

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