Buzun Erime Entalpisi

Buzun erimesi için gereken enerjiyi ölçme

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

Hedef

Bilinen kütlede buzu ılık suya ekleyerek ve sıcaklık değişimini ölçerek buzun erime entalpisini belirlemek.

Arka Plan

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).

Güvenlik Uyarıları

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

Gerekli KKD

goggles

Malzemeler

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

Ekipman

Polystyrene cup calorimeter Thermometer Analytical balance Paper towels

Prosedür

1

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

3 dak
2

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

2 dak
3

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

5 dak
4

Record the final equilibrium temperature.

2 dak
5

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

3 dak
6

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

5 dak

Beklenen Sonuçlar

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).

Temizlik

Pour water down the drain. Dry the calorimeter.

Ayrıntılar

Kategori
Thermochemistry
Zorluk
Beginner (Middle School)
Süre
25 dak
Tahmini Maliyet
$3,00
Adımlar
6
Malzemeler
2

Daha Fazla Deney

Bomba Kalorimetresi Simülasyonu 45 min Çözünme Her Zaman Ekzotermik Değildir 25 min Endotermik Tepkime Gösterisi 20 min Hess Yasasının Doğrulanması 60 min Kahve Kupası Kalorimetresi 40 min Magnezyumun Yanma Isısı 50 min Metallerin Özgül Isı Kapasitesi 40 min Sodyum Asetatın Ekzotermik Kristallenmesi 30 min Soğuk Paket Kimyası 20 min

Frequently Asked Questions

What is the objective of Buzun Erime Entalpisi?
Bilinen kütlede buzu ılık suya ekleyerek ve sıcaklık değişimini ölçerek buzun erime entalpisini belirlemek.
How difficult is Buzun Erime Entalpisi?
This experiment is rated as Beginner (Middle School). It takes approximately 25 minutes to complete.
What safety precautions are needed for Buzun Erime Entalpisi?
Key safety precautions include: Handle warm water with care; Dry ice before weighing to avoid extra water mass.
What materials are needed for Buzun Erime Entalpisi?
The main materials required are: Ice cubes, Warm water.
What results should I expect from Buzun Erime Entalpisi?
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).