A sample of Helium occupies 200 L at 30ºC under a pressure of 842 torr. What is the volume it occupies at standard temprature and pressure (STP)?
Standard temperature = 273 K = T2
Standard pressure = 1 atm = 760 torr = P2
Initial temperature T1 = 273 + 30 = 303 K
Initial pressure P1 = 842 torr
Initial volume V1 = 200 L
Let volume at STP = V2
Using combine gas law, P2V2/T2 = P1V1/T1
V2 = (P1V1/T1) ×T2/P2 = 199.64 L
Volume occupied at STP = 199.64 L
A sample of Helium occupies 200 L at 30ºC under a pressure of 842 torr. What...
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