ATAR Notes: Forum

VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Chemistry => Topic started by: TooLazy on March 15, 2017, 08:56:52 pm

Title: Chem prac help
Post by: TooLazy on March 15, 2017, 08:56:52 pm

How would you guys go about determining the methanol content of a sample methanol-ethanol mixture?

Also we are give three fuels ready to burn:
-Pure Methanol
-Pure Ethanol
-Meth/Eth mixture

Its related to calorimetry

Title: Re: Chem prac help
Post by: Gogo14 on March 16, 2017, 05:02:33 pm

burn the pure methanol and ethanol and measure the energy used to heat water (mass, temp controlled)
measure change in mass of fuels
calculate the deltaH for each and find the ratio of the change in enthalpies
burn the mixture and calculated the energy used to heat the same amount of water
measure change in mass of the mixture, and use the ratio to calculate the content of methanol and ethanol