Ideal Gas Equation OCR A level Chemistry

Hey,
Does anyone know for ocr a a level chemistry if you need to know the values for standard room temp and pressure? If so, what are the exact values because my notes and the textbook say different .
Thank you :smile:

Reply 1

BankaiGintoki

Original post by convivialkiwi

First the units
Pressure is in KPa
Volume in m3 (cm3 x 10^-6 -> m3) (dm3 x 10^-3 -> m3)
Temperature in K

If you are using pV = nRT, you will not need to use it if it is at RTP
Volume = Vm x moles where Vm = 24000 cm3 = 24 dm3 (the volume gas equation you learnt at gcse works only at RTP)

Did you get RTP values mixed up with standard values used for enthalpy changes?