F. Study questions.
1. You are provided with a glass stopper and common laboratory equipment. How will you proceed to
its density? Diagrams not required.
2. Briefly describe how will you find experimentally density of kerosene oil with a density bottle
3. How does the density of a liquid change with the rise in its temperature?
4. On the basis of change of density with the change in temperature, explain how do the liquids goth
when
Answers
Answer:
1-First, measure the mass of the glass stopper on a laboratory beam balance. Second, pour water on a calibrated beaker upto a level such that when you insert the stopper in the water, it doesn't over flow. The stopper will sink since it is denser than water. ... You will get the density of the stopper
2-mass of an empty density bottle. After that, fill the bottle with water and weigh the bottle once again. Now repeat the same with kerosene. Now, divide the mass of the kerosene by mass of the water and you will get the density of kerosene.
3-Cooling a substance/liquid causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density. Therefore, with rise with temperature, the density decreases.
4This expansion in solids and liquids is due to the increase in molecular vibration because of the heat energy which causes an increase in volume and decrease in density.