Half of the gas was released from the cylinder. How has the gas pressure in the cylinder changed?
| August 5, 2021 | education
P * V = (m / M) * R * T.
Since half of the gas was released from the cylinder, the gas mass, gas pressure changed in the cylinder, and the gas temperature, gas volume (cylinder volume) and its molar mass will be constant.
The initial state of the gas: P1 * V = (m1 / M) * R * T.
The final state of the gas: P2 * V = (m2 / M) * R * T, where m2 = 0.5 m1.
P2 * V = (0.5m1 / M) * R * T = 0.5P1 * V.
P2 = 0.5P1, therefore, the gas pressure in the cylinder has decreased by 2 times.
Answer: The gas pressure has decreased by 2 times.
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