Question: An insulated 0.08-m3 tank contains helium at 2 MPa and 80C. A valve is now opened, allowing some helium to escape. The valve is closed

An insulated 0.08-m3 tank contains helium at 2 MPa and 80°C. A valve is now opened, allowing some helium to escape. The valve is closed when one-half of the initial mass has escaped. Determine the final temperature and pressure in the tank.

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