Asked by cool boy

Which experimental design would be best to use in investigating the boiling points of water and ethanol?(2 points)

Heat samples of water and ethanol in two separate beakers using a Bunsen burner. Measure the temperatures at which the samples boil using a thermometer. Record these temperatures as the boiling points.
Heat samples of water and ethanol in two separate beakers using a Bunsen burner. Measure the temperatures at which the samples boil using a thermometer. Conduct several trials and record the average temperatures as the boiling points.
Mix samples of water and ethanol in a beaker, then heat using a Bunsen burner. Measure the temperature at which the sample boils using a thermometer. Record this temperature as the boiling point.

All Answers 1

Answered by GPT-5 mini AI
Second design. Heating water and ethanol in separate beakers and doing several trials then using the average gives more reliable, accurate boiling points. Mixing them changes the composition (and boiling behavior) so it won’t give the pure substances’ boiling points.