A sealed cylinder with a piston is filled with an ideal gas (See Start.docx

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A sealed cylinder with a piston is filled with an ideal gas (See Start). The piston is slowly moved until it is in the \'end\' position. Which of the following stateents describes the change that occurs? Start o End 10. O If the temperature remains constant, the pressure increases. O The number of moles of the gas decreases The volume remains constant but the temperature decreases. O The density of the gas (g/mL) in the cylinder decreases. O The pressure and temperature in the cylinder both decrease. Solution Here volume is decreasing: option 1 is correct. since T is constant, Pi*Vi = Pf*Vf since Vf < Vi, we have: Pf > Pi option 2 is wrong. The number of mol of gas is not changing since no gas is allowed to escape option 3 is wrong. here volume is decreasing option 4 is wrong. density = mass / volume since mass is same and volume is decreasing, density should increase option 5 is wrong. It can be said with accuracy Answer: option 1 .

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A sealed cylinder with a piston is filled with an ideal gas (See Start.docx

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