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Practice Q's

# Practice Q's - DATA THAT YOU MAY USE UNITS Volume Pressure...

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DATA THAT YOU MAY USE UNITS Conventional S.I. Volume mL or cm 3 = cm 3 or 10 -3 dm 3 Liter (L) = dm 3 Pressure atm = 760 torr = 1.013 × 10 5 Pa torr = 133.3 Pa Temperature ° C 0 ° C = 273.15 K PV L-atm = 1.013 × 10 5 dm 3 Pa =101.3 dm 3 kPa =101.3 J Energy 1 cal = 4.184 J (J= kg m 2 /s 2 ) 1 erg = 1 g cm 2 /s 2 = 10 -7 J Current ampere (A) = 1 C/s CONSTANTS Avogadro’s number N 6.022 x 10 23 mol -1 Boltzmann’s constant k 1.381 x 10 -23 J K -1 Faraday’s constant F 96 485 C mol -1 Values of R for various unit combinations 1.987 cal mol -1 K -1 0.08206 L atm mol -1 K -1 82.06 cm 3 atm mol -1 K -1 8.314 J mol -1 K -1 8.314 × 10 7 erg mol -1 K -1 8.314 dm 3 kPa mol -1 K -1 8.314 × 10 3 cm 3 kPa mol -1 K -1 Useful gas equations: Δ = 2 1 1 2 1 1 ln T T R H P P vap nRT PV = RT MPV m = 2 3 1 u m V N P = 2 2 2 2 1 1 1 1 T n V P T n V P = RT MP d = A k N RT e 2 3 = M RT u rms 3 = hdg P =

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