Questions and Answers
The specific heat of beryllium is ____ J/g°C.
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)
What is the initial temperature of aluminum metal?
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What is the change in temperature for the water when using aluminum?
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What was the final temperature of copper?
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What is the temperature change for water when using copper?
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What is the initial temperature of iron metal?
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What is the temperature change for water when using lead?
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What are the specific heat values for the metals?
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First, you measured the _____ of the metal and the water inside the calorimeter.
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Then, you _____ the metal and added it to water in the calorimeter.
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After heat transferred, you measured the _____ of both materials.
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Considering only specific heat, which metal would be the most ideal for use in cookware?
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What could be a reason for a student's specific heat values being lower than actual values?
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What equipment was used to stabilize the thermometer and the calorimeter?
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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.
