Specific Heat Quiz: Ideal Cookware Insights

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Questions and Answers

The specific heat of beryllium is ____ J/g°C.

1.82 (correct)

0.124

9520

9.61

0.549

Label each factor below as variable (V) or constant (C):

Mass of the water in the calorimeter = C Mass of the metal = V Change in temperature of the water = V Change in temperature of the metal = V Volume of water in calorimeter = V Calorimeter pressure = C Specific heat of water = C

Which actions would you take after the thermometer punctured a hole in the coffee cup? (Select all that apply)

Mention the spill to the teacher (correct)

Call 9-1-1

Clean the area (correct)

Throw the broken pieces away (correct)

Use the punctured cup as the outside cup

Replace the cup (correct)

What is the initial temperature of aluminum metal?

100 C Signup and view all the answers

What is the change in temperature for the water when using aluminum?

4.7 C Signup and view all the answers

What was the final temperature of copper?

24.6 C Signup and view all the answers

What is the temperature change for water when using copper?

1.9 Signup and view all the answers

What is the initial temperature of iron metal?

100 Signup and view all the answers

What is the temperature change for water when using lead?

0.7 Signup and view all the answers

What are the specific heat values for the metals?

0.90, 0.35, 0.44, 0.12 Signup and view all the answers

First, you measured the _____ of the metal and the water inside the calorimeter.

mass Signup and view all the answers

Then, you _____ the metal and added it to water in the calorimeter.

heated Signup and view all the answers

After heat transferred, you measured the _____ of both materials.

temperature change Signup and view all the answers

Considering only specific heat, which metal would be the most ideal for use in cookware?

Aluminum Signup and view all the answers

What could be a reason for a student's specific heat values being lower than actual values?

The metals were not heated to 100°C, The metals cooled before they were added to the water, The thermometer was not completely submerged in the water while reading, The calorimeter was not sealed properly, so heat escaped. Signup and view all the answers

What equipment was used to stabilize the thermometer and the calorimeter?

Buret clamp for the thermometer, beaker for the calorimeter Signup and view all the answers

Study Notes

Calorimetry and Specific Heat Study Notes

Beryllium has a specific heat of 1.82 J/g°C.
Factors in a calorimetry experiment are categorized as variable (V) or constant (C):
- Mass of water: V
- Mass of the metal: V
- Change in temperature of water: V
- Change in temperature of the metal: V
- Volume of water: C
- Calorimeter pressure: C
- Specific heat of water: C
In case of a spill due to a punctured coffee cup:
- Dispose of broken pieces
- Replace the cup
- Clean the area
- Inform the teacher
For aluminum:
- Initial metal temperature: 100°C
- Initial water temperature: 22.4°C
- Final temperature for both: 27.1°C
- Temperature change for water: 4.7°C
- Temperature change for metal: 72.9°C
For copper:
- Initial metal temperature: 100°C
- Initial water temperature: 22.7°C
- Final temperature for both: 24.6°C
- Temperature change for water: 1.9°C
- Temperature change for metal: 75.4°C
For iron:
- Initial metal temperature: 100°C
- Initial water temperature: 22.5°C
- Final temperature for both: 24.9°C
- Temperature change for water: 2.4°C
- Temperature change for metal: 75.1°C
For lead:
- Initial metal temperature: 100°C
- Initial water temperature: 22.6°C
- Final temperature for both: 23.3°C
- Temperature change for water: 0.7°C
- Temperature change for metal: 76.7°C
Specific heat values computed for metals:
- Aluminum: 0.90
- Copper: 0.35
- Iron: 0.44
- Lead: 0.12
Experiment process included measuring mass of metal and water, heating the metal, and measuring temperature changes.
The specific heat computation relied on principles including:
- First law of thermodynamics (heat lost by metal = heat gained by water)
- Understanding heat flow from hot to cooler objects
- Masses of water and metal
- Temperature changes for both
- Known specific heat of water
Lead is considered dangerous and heavy for cookware. Aluminum and iron are ideal choices for cookware due to their properties.
Buret clamp stabilizes the thermometer, while the beaker stabilizes the calorimeter.
Using two coffee cups helps prevent heat loss from the calorimeter during the experiment.
Possible error sources in measuring specific heat:
- Metals not heated to 100°C
- Metals cooling before adding them to water
- Incomplete thermometer submersion
- Improper sealing of the calorimeter leading to heat loss

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Description

Test your knowledge on calorimetry and specific heat with this lab quiz. Answer questions about the specific heat of beryllium and identify factors in lab experiments. Perfect for students looking to reinforce their understanding of thermal properties and experimental procedures.