爆弾熱量測定シミュレーション

熱量測定で食品のエネルギー含量を測定する

Thermochemistry Intermediate (High School) 45 分 ~$10.00

目的

様々な食品を燃焼させて水への熱移動を測定し、そのエネルギー（カロリー）含量を測定する。

背景

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.

安全上の警告

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

必要なPPE

goggles lab_coat

材料

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

器具

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

手順

1

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

3 分
2

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

5 分
3

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

2 分
4

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

5 分 Open flame — be careful
5

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

2 分 Can is hot
6

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

5 分
7

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

15 分
8

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

5 分

予想される結果

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.

後片付け

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

詳細

カテゴリ
Thermochemistry
難易度
Intermediate (High School)
所要時間
45 分
推定費用
$10.00
ステップ数
8
材料
3

その他の実験

コーヒーカップ熱量測定 40 min コールドパックの化学 20 min ヘスの法則の検証 60 min マグネシウムの燃焼熱 50 min 吸熱反応のデモンストレーション 20 min 氷の融解エンタルピー 25 min 溶解は常に発熱ではない 25 min 酢酸ナトリウムの発熱結晶化 30 min 金属の比熱容量 40 min

Frequently Asked Questions

What is the objective of 爆弾熱量測定シミュレーション?
様々な食品を燃焼させて水への熱移動を測定し、そのエネルギー（カロリー）含量を測定する。
How difficult is 爆弾熱量測定シミュレーション?
This experiment is rated as Intermediate (High School). It takes approximately 45 minutes to complete.
What safety precautions are needed for 爆弾熱量測定シミュレーション?
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 爆弾熱量測定シミュレーション?
The main materials required are: Food samples, Distilled water, Aluminum foil.
What results should I expect from 爆弾熱量測定シミュレーション?
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.