Entalpi Fusi Es

Mengukur energi yang diperlukan untuk melelehkan es

Thermochemistry Beginner (Middle School) 25 menit ~$3,00

Tujuan

Tentukan entalpi fusi es dengan menambahkan massa es yang diketahui ke air hangat dan mengukur perubahan suhu.

Latar Belakang

When ice melts, it absorbs energy from its surroundings without changing temperature (latent heat). By adding ice to warm water in a calorimeter and measuring the final temperature, the enthalpy of fusion can be calculated. The accepted value is 6.01 kJ/mol (334 J/g).

Peringatan Keselamatan

  • Handle warm water with care
  • Dry ice before weighing to avoid extra water mass

APD yang Diperlukan

goggles

Bahan

  • Ice cubes (50 g)
    From distilled water preferred
  • Warm water (100 mL)
    About 40°C

Peralatan

Polystyrene cup calorimeter Thermometer Analytical balance Paper towels

Prosedur

1

Add 100 mL of warm water (~40°C) to the calorimeter. Record exact temperature and mass.

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2

Quickly dry ice cubes with paper towel and weigh them. Record mass.

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3

Add the ice to the warm water. Stir gently until all ice melts.

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4

Record the final equilibrium temperature.

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5

Set up the equation: heat lost by warm water = heat to melt ice + heat to warm melted ice to final T.

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6

Solve for ΔHfus. Convert to kJ/mol (multiply by 18.015 g/mol). Compare with 6.01 kJ/mol.

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Hasil yang Diharapkan

The final temperature should be around 10-15°C. Calculated ΔHfus should be approximately 280-350 J/g (accepted: 334 J/g or 6.01 kJ/mol).

Pembersihan

Pour water down the drain. Dry the calorimeter.

Detail

Kategori
Thermochemistry
Tingkat Kesulitan
Beginner (Middle School)
Durasi
25 menit
Perkiraan Biaya
$3,00
Langkah
6
Bahan
2

Eksperimen Lainnya

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Frequently Asked Questions

What is the objective of Entalpi Fusi Es?
Tentukan entalpi fusi es dengan menambahkan massa es yang diketahui ke air hangat dan mengukur perubahan suhu.
How difficult is Entalpi Fusi Es?
This experiment is rated as Beginner (Middle School). It takes approximately 25 minutes to complete.
What safety precautions are needed for Entalpi Fusi Es?
Key safety precautions include: Handle warm water with care; Dry ice before weighing to avoid extra water mass.
What materials are needed for Entalpi Fusi Es?
The main materials required are: Ice cubes, Warm water.
What results should I expect from Entalpi Fusi Es?
The final temperature should be around 10-15°C. Calculated ΔHfus should be approximately 280-350 J/g (accepted: 334 J/g or 6.01 kJ/mol).