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A sample of Helium occupies 200 L at 30ºC under a pressure of 970 torr. What is the volume it occupies at standard temprature and pressure (STP)?

6 years ago


Answers : (1)


Hi, Cane


Use ideal gas eqn

P V/ T = constant


P1  = 970 TORR     V1 = 200L      T1 = 30 + 273 = 303 K

P2 = 760 TORR ( AT STP)

V2 = x          T2 = 25 + 273 = 298 K


Now use

970 * 200/ 303 = 760 * x/ 298

=> x = 251.05 L



6 years ago

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