12.2 Ideal gas law

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30/5/22

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5 Terms

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universal gas constant

R = 8.314 kPaL/Kmol (kilopascal litres/ Kelvin mol)

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ideal gas law

R = PV / nT or PV = nRT

<p>R = PV / nT or PV = nRT</p>
3
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use ideal gas law to find molar volume

  • PV = nRT

  • V = nRT/P

  • V/n = RT/P

  • since V/n is molar volume, mV = RT / P

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use ideal gas law to find density

  • D = m/V

  • V = m/D

  • substitute V = m/D into PV = nRT

  • Pm/d = nRT

  • Pm = nRTD

  • D = Pm/nRT

  • since m/n is mm, D = mmP/RT

  • since P/RT is mV, this is the same as D = mm/mV

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use ideal gas law to find mm

  • substitute n = m/mm into PV = nRT

  • PV = mRT/mm

  • mmPV = mRT

  • mm = mRT/PV