Which experiment design would be the best to use in investigating the booking points of water and ethanol?
A. Heat samples of water and ethanol in two separate beakers using 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
B. 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.
C. 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.
D. 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. Conduct several trials and record the average the temperature as the boiling point.
I must confess I don't know what a booking point of water or ethanol is.
To investigate the boiling points of water and ethanol, the best experiment design would be option A: 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.
Explanation:
Option A is the best experiment design because it ensures that the water and ethanol are heated separately, in two separate beakers. This is important because water and ethanol have different boiling points, and heating them together in a mixed sample (as in option B and D) would not accurately measure their individual boiling points.
By conducting several trials and recording the average temperatures at which the samples boil, any random error or variations in temperature measurements can be minimized. This increases the reliability and accuracy of the data collected.
Option C, while similar to option A, does not mention conducting several trials or calculating the average temperatures. A single measurement may be affected by random error or other factors, and taking the average of multiple trials helps to account for these variations.
Option D involves mixing the samples of water and ethanol before heating. As mentioned before, this would result in inaccurate measurements of their individual boiling points since they would not be heated separately.
In conclusion, option A is the best experiment design as it ensures accurate measurement of the boiling points of water and ethanol by heating them separately and conducting multiple trials to calculate average temperatures.