Metallerin Özgül Isı Kapasitesi

Alüminyum, bakır ve demirin ısı kapasitelerini karşılaştırma

Thermochemistry Intermediate (High School) 40 dak ~$10,00

Hedef

Karıştırma yöntemiyle birkaç metalin özgül ısı kapasitesini belirlemek ve kabul görmüş değerlerle karşılaştırmak.

Arka Plan

The specific heat capacity of a metal can be determined by heating a known mass of metal to a known temperature, then transferring it to water in a calorimeter and measuring the temperature change. Energy conservation (q_metal = -q_water) allows calculation of the metal's specific heat.

Güvenlik Uyarıları

  • Hot metals and boiling water — burn risk
  • Use tongs to transfer hot metals
  • Do not touch hot metals with bare hands

Gerekli KKD

goggles lab_coat

Malzemeler

  • Metal samples (Al, Cu, Fe) (50 g each)
    Cylindrical pieces work best
  • Distilled water (300 mL)
  • Boiling water (500 mL)
    For heating metals

Ekipman

Polystyrene cup calorimeter Beaker (600 mL) Hot plate Thermometer (2) Analytical balance Tongs String

Prosedür

1

Weigh each metal sample accurately. Record masses.

3 dak
2

Place all metals in boiling water for 10 minutes to reach 100°C.

12 dak Handle hot water carefully
3

Add 100 mL room-temperature water to the calorimeter. Record initial temperature.

2 dak
4

Using tongs, quickly transfer the aluminum sample to the calorimeter. Stir and record max temperature.

5 dak Hot metal — use tongs
5

Calculate c(Al) = m(water)×c(water)×ΔT(water) / [m(Al)×ΔT(Al)].

5 dak
6

Repeat steps 3-5 for copper and iron.

15 dak
7

Compare measured values with accepted: Al=0.897, Cu=0.385, Fe=0.449 J/g°C.

5 dak

Beklenen Sonuçlar

Aluminum should give the largest temperature rise in the water (highest specific heat), followed by iron, then copper. Measured values should be within 10-20% of accepted values.

Temizlik

Allow metals to cool completely. Dry and store. Pour water down the drain. Clean calorimeter.

Ayrıntılar

Kategori
Thermochemistry
Zorluk
Intermediate (High School)
Süre
40 dak
Tahmini Maliyet
$10,00
Adımlar
7
Malzemeler
3

Daha Fazla Deney

Bomba Kalorimetresi Simülasyonu 45 min 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 Sodyum Asetatın Ekzotermik Kristallenmesi 30 min Soğuk Paket Kimyası 20 min

Frequently Asked Questions

What is the objective of Metallerin Özgül Isı Kapasitesi?
Karıştırma yöntemiyle birkaç metalin özgül ısı kapasitesini belirlemek ve kabul görmüş değerlerle karşılaştırmak.
How difficult is Metallerin Özgül Isı Kapasitesi?
This experiment is rated as Intermediate (High School). It takes approximately 40 minutes to complete.
What safety precautions are needed for Metallerin Özgül Isı Kapasitesi?
Key safety precautions include: Hot metals and boiling water — burn risk; Use tongs to transfer hot metals; Do not touch hot metals with bare hands.
What materials are needed for Metallerin Özgül Isı Kapasitesi?
The main materials required are: Metal samples (Al, Cu, Fe), Distilled water, Boiling water.
What results should I expect from Metallerin Özgül Isı Kapasitesi?
Aluminum should give the largest temperature rise in the water (highest specific heat), followed by iron, then copper. Measured values should be within 10-20% of accepted values.