Lab: Thermal Energy Transfer

Question 1

Throughout the reflection, make sure you have a copy of the Student Guide and your data tables. Use the drop-down menus to complete the statements. The independent variables in Part I, the ones intentionally manipulated, are the . The independent variable in Part II, the one that is intentionally manipulated, is the . The dependent variable for both Parts I and II, the one that you measure the response in, is the .

Revolt · Accepted Answer

A: mass and type of material

Question 2

Based on what you have learned about the units for measuring thermal energy, complete the following passage. The unit often used in chemistry and physics to measure energy, such as for work or electrical current, is the . We can also use this unit, as we did in this lab, for measuring . This is a property that is quantified by the energy needed per of material to raise the temperature by one . The unit for this measure is therefore .

Revolt · Accepted Answer

C: joule

Question 3

When using a calorimeter, the initial temperature of a metal is 70.4C. The initial temperature of the water is 23.6C. At the end of the experiment, the final equilibrium temperature of the water is 29.8C. What is the final temperature of the metal? C What is the temperature change of the water? C What is the temperature change of the metal? C

Revolt · Accepted Answer

Part 1: 29.8; Part 2: 6.2; Part 3: -40.6

Question 4

In an experiment, 50 g of each material were placed in a calorimeter with the same starting water volume and temperature. Which is the best interpretation of the chart?

Revolt · Accepted Answer

C: Different materials have different abilities to transfer energy.

Question 5

Use this chart showing the different specific heat of various materials to answer the questions. Which material has the highest specific heat? Which material has the lowest specific heat? Which material has the ability to absorb twice as much heat as aluminum when placed in the same environment of mass and temperature?

Revolt · Accepted Answer

C: water

Question 6

Question 6

Revolt · Accepted Answer

0.64

Question 7

Which are potential sources of error in the experiment? Check all that apply.estimating temperature to the nearest tenth of a degreeestimating the mass of the sample to the nearest tenth of a gramestimating the thickness of the foam cupsthe position of the cups of sand and water under the heat lampthe brand of light bulb used for the heat lampthe air temperature outside the lab

Revolt · Accepted Answer

A: estimating temperature to the nearest tenth of a degree; B: estimating the mass of the sample to the nearest tenth of a gram; D: the position of the cups of sand and water under the heat lamp

Question 8

Which are ways to improve the design of this experiment? Check all that apply.Reduce the sample size so the experiment can be done faster.Increase the sample size from 6 cups to 12 cups of sand and water.Use more legible handwriting when recording data.Use more precise digital thermometers.Use more precise scales that measure to the hundredth of a gram.

Revolt · Accepted Answer

B: Increase the sample size from 6 cups to 12 cups of sand and water.; D: Use more precise digital thermometers.; E: Use more precise scales that measure to the hundredth of a gram.

Question 9

Question 9

Revolt · Accepted Answer

B: type of material

Question 10

Question 10

Revolt · Accepted Answer

B: specific heat

Lab: Thermal Energy Transfer Answers

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