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0.228lbm of Air is trapped in a syringe at 2.0atm and 540 degree R. The air is i

ID: 3163115 • Letter: 0

Question

0.228lbm of Air is trapped in a syringe at 2.0atm and 540 degree R. The air is injected into a container initially containing 1lbm of air at 1.0 atm and 540 degree R. Assume the plunger maintains the state of the injected gas constant until all the air is injected and that the container is sealed, except at the syringe injection site. Ignore heat transfer with the surroundings and kinetic and potential energy effects. Assume ideal gas model for air. Determine the final equilibrium temperature and pressure of the air in the container after all the injected air has entered.

Explanation / Answer

The final equilibrium presssure will be 1.5 atm which hold s equal pressure in the syringe and the container

The final equilibrium temperature is 540 R, since there is no heat transfer between the surroundings