बम ऊष्मामिति सिमुलेशन

ऊष्मामिति का उपयोग करके भोजन की ऊर्जा सामग्री मापना

Thermochemistry Intermediate (High School) 45 मिनट ~$10.00

उद्देश्य

विभिन्न खाद्य पदार्थों को जलाकर और पानी में स्थानांतरित गर्मी मापकर उनकी ऊर्जा (कैलोरी) सामग्री मापें।

पृष्ठभूमि

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.

सुरक्षा चेतावनियाँ

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

आवश्यक PPE

goggles lab_coat

सामग्री

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

उपकरण

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

प्रक्रिया

1

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

3 मिनट
2

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

5 मिनट
3

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

2 मिनट
4

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

5 मिनट Open flame — be careful
5

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

2 मिनट Can is hot
6

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

5 मिनट
7

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

15 मिनट
8

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

5 मिनट

अपेक्षित परिणाम

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.

सफाई

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

विवरण

श्रेणी
Thermochemistry
कठिनाई
Intermediate (High School)
अवधि
45 मिनट
अनुमानित लागत
$10.00
चरण
8
सामग्री
3

अधिक प्रयोग

ऊष्माशोषी अभिक्रिया प्रदर्शन 20 min कॉफी कप ऊष्मामिति 40 min कोल्ड पैक रसायन 20 min धातुओं की विशिष्ट ऊष्मा क्षमता 40 min बर्फ की संलयन एन्थैल्पी 25 min मैग्नीशियम के दहन की गर्मी 50 min विघटन हमेशा ऊष्माक्षेपी नहीं होता 25 min सोडियम एसीटेट का ऊष्माक्षेपी क्रिस्टलीकरण 30 min हेस के नियम का सत्यापन 60 min

Frequently Asked Questions

What is the objective of बम ऊष्मामिति सिमुलेशन?
विभिन्न खाद्य पदार्थों को जलाकर और पानी में स्थानांतरित गर्मी मापकर उनकी ऊर्जा (कैलोरी) सामग्री मापें।
How difficult is बम ऊष्मामिति सिमुलेशन?
This experiment is rated as Intermediate (High School). It takes approximately 45 minutes to complete.
What safety precautions are needed for बम ऊष्मामिति सिमुलेशन?
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 बम ऊष्मामिति सिमुलेशन?
The main materials required are: Food samples, Distilled water, Aluminum foil.
What results should I expect from बम ऊष्मामिति सिमुलेशन?
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.