1. Some ideal gases initially have press P and volume V. If the gas undergoes isothermal process so that the final pressure becomes 4 times the initial pressure, then the final volume of gas is…
Kjent:
Starttrykk (P1) = P
Slutttrykk (P2) = 4P
Opprinnelig volum (V1) = V
Wanted: Sluttvolum (V2)
løsning:
Formelen for Boyles lov :
P V = konstant
P1 V1 = P2 V2
(P)(V) = (4P)(V2)
V = 4 V2
V2 = V / 4 = ¼ V
The final volume of gases is ¼ times the initial volume.
2. In a closed container, the gas expands so that the slutt~~POS=TRUNC volum blir 2 times the initial volume (V = initial volume, P = initial pressure). The final pressure of gases is…
Kjent:
Starttrykk (P1) = P
Opprinnelig volum (V1) = V
Sluttvolum (V2) = 2V
Ønsket : Slutttrykk (P2)
løsning:
P1 V1 = P2 V2
P V = P2 (2V)
P = P2 (2)
P2 = P / 2 = ½ P
The gases pressure becomes ½ times the initial pressure.
3. In a closed container, gases having a pressure of 2 atm and a volume of 1 liter. If gas pressure becomes 4 atm then gas volume becomes …
Kjent:
Starttrykk (P1) = 2 atm = 2 x 105 Pa
Slutttrykk (P2) = 4 atm = 4 x 105 Pa
Opprinnelig volum (V1) = 1 liter = 1 dm3 = 1 x 10-3 m3
Ønsket : Sluttvolum (V2)
løsning:
P1 V1 = P2 V2
(2 x 105)(1 x 10-3) = (4 x 105) V2
(1)(1 x 10-3) = (2) V2
1 x 10-3 = (2) V2
V2 = ½ x 10-3
V2 = 0.5 x 10-3 m3 = 0.5 dm3 = 0.5 liters
