which of these changes most likely results in an increase in the volume of a gas?\ndecreasing the pressure…

which of these changes most likely results in an increase in the volume of a gas?\ndecreasing the pressure on the gas\ncooling the gas\nremoving some of the gas from the sample

which of these changes most likely results in an increase in the volume of a gas?\ndecreasing the pressure on the gas\ncooling the gas\nremoving some of the gas from the sample

Answer

Explanation:

Step1: Recall gas - law relationship

According to Boyle's law ($P_1V_1 = P_2V_2$ for a given amount of gas at constant temperature), volume and pressure of a gas are inversely proportional. According to Charles's law ($\frac{V_1}{T_1}=\frac{V_2}{T_2}$ for a given amount of gas at constant pressure), volume and temperature of a gas are directly proportional.

Step2: Analyze each option

  • Decreasing the pressure on the gas: Since $P$ and $V$ are inversely proportional, when $P$ decreases, $V$ increases.
  • Cooling the gas: Since $V$ and $T$ are directly proportional, cooling (decreasing $T$) will decrease $V$.
  • Removing some of the gas from the sample: Removing gas reduces the amount of gas ($n$), and according to the ideal - gas law $PV = nRT$, this will generally decrease the volume if other factors are held constant.

Answer:

decreasing the pressure on the gas