idealgas

# idealgas - idealgas equation describes hypothetical...

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ideal-gas equation  - describes hypothetical gas (ideal gas) results not exactly correct for actual gases PV = nRT o R = gas constant , depends on values of P, V, n, T o T = temperature, always expressed as absolute temperature o n = number of moles of gas o P = pressure, usually given in atm o V = volume, usually given in L standard temperature and pressure (STP) - 0 C, 1 atm o molar volume - 22.41 L/mol all gas laws derived from the ideal-gas equation P1V1/T1 = P2V2/T2 Find the temperature of gas at which 0.407 mol takes up 3.23 L of space at 118 in Hg  Given: o PV = nRT o P = 118 in = (118 in x 2.54 cm/in x 10 mm/cm) = 2997.2 mm = 3.94 atm o V = 3.32 L o n = 0.407 o R = 0.08206 (L-atm/mol-K) (3.94)(3.23) = (0.407)(0.08206)T T = [(3.94)(3.23)] / [(0.407)(0.08206)] T = 381 K gas density  - unit mass per unit volume n/V = P/(RT) density = n(molar mass)/V = P(molar mass)/(RT) higher molar mass/pressure >> higher gas density

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idealgas - idealgas equation describes hypothetical...

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