Determination of the molar mass of a liquid

 Principle The molar mass of a liquid is to be determined by evaporating a liquid at constant temperature and pressure, and measuring the volume of vapour formed using a calibrated gas syringe. Benefits For both demonstration and student experiments Simple procedure - fast results Glass jacket system easily expandable Tasks Determine the molar masses of diethyl ether and methanol. Discuss the results in terms of the real and ideal behaviour of vapours. Learning objectives Ideal and ordinary gases Equations of state for ideal gases Gas volumetry Determination of molar masses according to the vapour density method (Victor Meyer) Necessary accessories: This experiments requires a precision balance Precision Balance, Sartorius ENTRIS® II, 620 g : 1 mg (49311-99)