Question

газ изотермически сжали от объема 8 л до объема 6л. Давление при этомизменилось на 120кПа. определите начальное давление газа

Answer 1

Закон Бойля-Мариотта для изотермического процесса:
P1V1=P2V2
P2=P1+120000
P1V1-P1V2=120V2
P1=120000V2/(V1-V2)

Answer 2

Gas Compression Calculation

To determine the initial pressure of the gas, we can use the formula for an isothermal process, which relates the initial and final volumes and pressures of a gas:

P1 * V1 = P2 * V2

Where: - P1 = initial pressure - V1 = initial volume - P2 = final pressure - V2 = final volume

Given: - Initial volume (V1) = 8 L - Final volume (V2) = 6 L - Change in pressure (ΔP) = 120 kPa

We can use the formula to solve for the initial pressure (P1):

P1 = (P2 * V2) / V1

Substituting the given values: P1 = (P2 * V2) / V1 P1 = (P2 - ΔP) * V2 / V1 P1 = (P2 - 120 kPa) * 6 L / 8 L

Calculation

P1 = (P2 - 120) * 6 / 8

Now, let's calculate the initial pressure.