Question

Answering the following questions will help you focus on the outcomes of the experiments.

Experiment 1:
1. What happens to the water in the small tube as the water in the test tube absorbs heat?
2. Why do you think a small tube was used to observe the expansion of water?
Experiment 2:
1. Compare the circumference of the balloon before and after freezing. What is the percent increase in this
measurement?
Combined Results
Write a summary paragraph discussing this experiment and the results. Use the following questions and topics to help
guide the content of your paragraph.
Summarize the conclusions that you can draw from this experiment. Use the questions above to guide your ideas.
2. Summarize any difficulties or problems you had in performing the experiment that might have affected the results.
Describe how you might change the procedure to avoid these problems.
3. Describe at least two real-world issues or examples that illustrate the findings of this experiment.
WRITER
Word Count: of 400
OVERALL SCORE:

Answer 1

The 2-L bottle of water lost more heat because it had a greater mass, despite the same initial and final temperatures. Poor insulation in calorimeters causes greater apparent heat loss in reactions, and taking into account calorimeter heat capacity would lower the observed heat of dissolution. Thermal expansion is a key principle in various real-world applications.

Step-by-step explanation:

Concerning the first part of the question about heat loss in 500-mL and 2-L bottles of water, the second student's assertion is correct; the 2-L bottle lost more heat due to the greater amount of water. The errors in other responses are: the first student didn't consider the mass of water, the third ignored that heat loss is not directly proportional to the rate of cooling, and the fourth overlooked the idea that despite not knowing the exact temperatures, heat loss still depends on mass.

For calorimetry involving poor insulators, the measured amount of heat in reactions would appear greater because of additional heat loss to the surroundings. Taking into account the heat capacity of the calorimeter would make the measured heat of dissolution appear lesser because some of the heat is absorbed by the calorimeter itself.

In thermal expansion, as temperatures increase, the length, volume, or circumference of materials will generally increase, which is an important consideration in engineering, manufacturing, and climate science.

Answer 2

ex.1

1.The water in the test tube expands as it is heated. There is only one direction to expand in, the glass tube. This glass tube is narrow so that a small change in volume will result in a considerable change in height; your signal is amplified. This is the same phenomenon as in thermometers with a glass bulb on the lower end.

2. there will be a thermal expansion will happened.