Bomba Kalorimetresi Simülasyonu

Kalorimetreyle besinlerin enerji içeriğini ölçme

Thermochemistry Intermediate (High School) 45 dak ~$10,00

Hedef

Farklı besinlerin enerji (kalori) içeriğini yakarak ve suya aktarılan ısıyı ölçerek belirlemek.

Arka Plan

A simple food calorimeter uses the heat from burning food to raise the temperature of water. By measuring the mass of food burned and the temperature rise of the water, the energy content can be calculated. This demonstrates why some foods have more calories than others.

Güvenlik Uyarıları

  • Open flame — keep flammables away
  • Burning food produces smoke — ventilate
  • The can will get hot — do not touch with bare hands

Gerekli KKD

goggles lab_coat

Malzemeler

  • Food samples (10 g each)
    Peanuts, cashews, marshmallows, chips
  • Distilled water (400 mL)
  • Aluminum foil (1 sheet)
    For makeshift shield

Ekipman

Empty aluminum soda can Ring stand and ring Needle or pin (mounted) Lighter Thermometer Analytical balance (0.01 g)

Prosedür

1

Measure 100 mL of water and pour into the soda can. Record the initial temperature.

3 dak
2

Set up the can on the ring stand. Position a mounted needle below the can to hold the food sample.

5 dak
3

Weigh a food sample (e.g., one peanut) accurately. Impale it on the needle.

2 dak
4

Light the food sample with the lighter. Position it under the can to heat the water.

5 dak Open flame — be careful
5

When the food stops burning, immediately stir and record the maximum water temperature.

2 dak Can is hot
6

Calculate energy: q = m(water) × c × ΔT. Convert to kJ/g or Cal/g.

5 dak
7

Repeat for different food types. Compare measured values with nutritional labels.

15 dak
8

Discuss why measured values are lower than label values (heat lost to surroundings).

5 dak

Beklenen Sonuçlar

Nuts (high fat) should give the highest energy per gram (~25 kJ/g measured vs ~25 kJ/g label). Marshmallows (sugar) ~15 kJ/g. Measured values will be 30-50% lower than label values due to heat losses.

Temizlik

Allow everything to cool. Dispose of food residue. Rinse the can and clean the work area.

Ayrıntılar

Kategori
Thermochemistry
Zorluk
Intermediate (High School)
Süre
45 dak
Tahmini Maliyet
$10,00
Adımlar
8
Malzemeler
3

Daha Fazla Deney

Buzun Erime Entalpisi 25 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 Bomba Kalorimetresi Simülasyonu?
Farklı besinlerin enerji (kalori) içeriğini yakarak ve suya aktarılan ısıyı ölçerek belirlemek.
How difficult is Bomba Kalorimetresi Simülasyonu?
This experiment is rated as Intermediate (High School). It takes approximately 45 minutes to complete.
What safety precautions are needed for Bomba Kalorimetresi Simülasyonu?
Key safety precautions include: Open flame — keep flammables away; Burning food produces smoke — ventilate; The can will get hot — do not touch with bare hands.
What materials are needed for Bomba Kalorimetresi Simülasyonu?
The main materials required are: Food samples, Distilled water, Aluminum foil.
What results should I expect from Bomba Kalorimetresi Simülasyonu?
Nuts (high fat) should give the highest energy per gram (~25 kJ/g measured vs ~25 kJ/g label). Marshmallows (sugar) ~15 kJ/g. Measured values will be 30-50% lower than label values due to heat losses.