Dumas Method

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Issue:

Science

 

Written by:

Holly B

 

Date added:

February 29, 2016

 

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Grade:

A

 

No of pages / words:

8 / 2089

 

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6533 times

 

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In this situation, vapours are assumed to be obeying the Ideal Gas Law, which is PV = nRT. P is the current atmospheric temperature, measured in atmospheres, V is the volume of the flask, n is the moles of the gas and T is the temperature of the water bath, measured in degrees Kelvin (Weisstein, 2007)...
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R remains a constant, which is 0.08206 L atm/K mol (Weisstein, 2007). The equation used to solve for n (mass/molecular weight) is substituted into the Ideal Gas Law and then rearranged in order to solve for molecular weight (MW). As a result, the equation used in the Dumas Method is as follows: MW = mRT/PV (Giunta, 2003)...
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