Determining a gas constant: When heated a mass of KClO 3 (s) of 2.3020 grams, ge

Question

Determining a gas constant:

When heated a mass of KClO3(s) of 2.3020 grams, generates .0383 grams of oxygen. The initial volume (of water) in the gas buret in mL was 2.35, with the final volume being 31.27 mL. The room temperature is 296.15 K and barometric pressure is 755.1 mm Hg. The appendix for vapor pressure of water says for 23 degrees celsius there is 21.085 mm Hg. What is R, Rmin and Rmax from ideal gas equation of state with units? What is R from Van Der Waals equation of state with Units?

Explanation / Answer

Ideal Gas Equation

PV = nRT

R = PV/nT

R = (755.1 mmHg)(1atm/760 mmHg) (0.00235 L)/(0.0383 g)/(32 g/mol)(296.15 K)

R = 0.006587 atm L / mol K

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