Kapasitas Panas Spesifik Logam

Membandingkan kapasitas panas aluminium, tembaga, dan besi

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

Tujuan

Tentukan kapasitas panas spesifik beberapa logam menggunakan metode campuran dan bandingkan dengan nilai yang diterima.

Latar Belakang

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.

Peringatan Keselamatan

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

APD yang Diperlukan

goggles lab_coat

Bahan

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

Peralatan

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

Prosedur

1

Weigh each metal sample accurately. Record masses.

3 menit
2

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

12 menit Handle hot water carefully
3

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

2 menit
4

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

5 menit Hot metal — use tongs
5

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

5 menit
6

Repeat steps 3-5 for copper and iron.

15 menit
7

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

5 menit

Hasil yang Diharapkan

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.

Pembersihan

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

Detail

Kategori
Thermochemistry
Tingkat Kesulitan
Intermediate (High School)
Durasi
40 menit
Perkiraan Biaya
$10,00
Langkah
7
Bahan
3

Eksperimen Lainnya

Demonstrasi Reaksi Endotermik 20 min Entalpi Fusi Es 25 min Kalorimetri Cangkir Kopi 40 min Kimia Kompres Dingin 20 min Kristalisasi Eksotermik Natrium Asetat 30 min Panas Pembakaran Magnesium 50 min Pelarutan Tidak Selalu Eksotermik 25 min Simulasi Kalorimetri Bom 45 min Verifikasi Hukum Hess 60 min

Frequently Asked Questions

What is the objective of Kapasitas Panas Spesifik Logam?
Tentukan kapasitas panas spesifik beberapa logam menggunakan metode campuran dan bandingkan dengan nilai yang diterima.
How difficult is Kapasitas Panas Spesifik Logam?
This experiment is rated as Intermediate (High School). It takes approximately 40 minutes to complete.
What safety precautions are needed for Kapasitas Panas Spesifik Logam?
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 Kapasitas Panas Spesifik Logam?
The main materials required are: Metal samples (Al, Cu, Fe), Distilled water, Boiling water.
What results should I expect from Kapasitas Panas Spesifik Logam?
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.