10.We have some gas in a container at high pressure. The volume of the container

Question

10.We have some gas in a container at high pressure. The volume of the container is 409 cm3 . The pressure of the gas is 2.52 × 105 Pa. We allow the gas to expand at constant temperature until its pressure is equal to the atmospheric pressure, which at the time is 0.857 × 105 Pa. (a) Find the work (J) done on the gas. (b) Find the change of internal energy (J) of the gas. (c) Find the amount of heat (J) we added to the gas to keep it at constant temperature. Be sure to include the correct signs on the answers.

Explanation / Answer

Work is mass x volume x (P2 - P1) 409x[(2.52x105)-(.857-105)] =683kJ

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