Suppose the volume of the syringe is 45.8 cc. You measure the pressure as 1.49 a

Question

Suppose the volume of the syringe is 45.8 cc. You measure the pressure as 1.49 atm, and the temperature as 19.4o C. Assume: the diameter of the plunger on the syringe is 1.34 cm.

Suppose the volume of the syringe is 45.8 cc. You measure the pressure as 1.49 atm, and the temperature as 19.4degree C. Assume: the diameter of the plunger on the syringe is 1.34 cm. Find -n, the number of moles of gas in the syringe: .00284 -N, the number of molecules of gas in the syringe: 1.71E21 -Use the molear mass of air given to calculate the mass of air in the syringe: 8.23E-5 kg Suppose you push down the syringe so the volume is now 40.5 cc, with the temperature remaining unchanged. Find: -the new pressure inside the syringe. 1.78 atm -the force exerted by the gas on the plunger of the syringe: 2.53E-9 N

Explanation / Answer

B1)

P1V1 =P2V2

P2 = P1V1/V2 =1.49*45.8/40.5 =1.68498 atm

B2)

F =P*S =1.68498*101325/pi/0.0134^2 =3.02659*10^8 N

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