When the gas was compressed, its volume decreased from 8 to 5 liters, and the pressure
| September 16, 2021 | education
When the gas was compressed, its volume decreased from 8 to 5 liters, and the pressure increased by 60 kPa. Find the initial pressure.
Task data: V1 (initial gas volume) = 8 l; V2 (final volume) = 5 l; ΔР (change (increase) pressure) = 60 kPa; the compression of a given gas is assumed to be isothermal.
To find the desired initial pressure of a given gas, we apply the proportion: P1 * V1 = P2 * V2 = (P1 + ΔP) * V2.
Substitute the known values: P1 * 8 = (P1 + 60) * 5.
8P1 = 5P1 + 300.
3P1 = 300 and P1 = 300/3 = 100 kPa.
Answer: Before compression, the target gas was exposed to a pressure of 100 kPa.
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