Menghitung Perubahan Entalpi Reaksi

 Percobaan 1

Tujuan : Menentukan Entalpi Pelarutan KNO3 dan NaOH dalam air

Alat dan Bahan

1. Neraca

2. Termometer (-10 - 100 0C)

3. Gelas Polistirena/ gelas plastik/kalori meter

4. Gelas Ukur 100 mL

5. Gelas arloji

6. KNO3 padat

7. NaOH padat

Cara Kerja

1. Hitung massa 0,1 mol KNO3

2. Tambahkan 100 mL air ke gelas plastik dan catat suhunya

3. Timbang 0,1 mol KNO3 dengan gelas arloji 

4. Segera masukkan ke dalam gelas plastilk

5. Aduk dengan termometer lalu catat suhu paling rendah yang dicapai

6. Cuci kalorimeter dan ulangi dengan 0,1 mol NaOH

7. Catat hasil percobaan pada lembar pengamatan 

Pengamatan

1. KNO3

1. Massa 1 mol KNO3 :..............................................................................................

2. Massa 0,1 mol KNO3 :..............................................................................................

3. Massa Gelas arloji + KNO3 :..............................................................................................

4. Massa gelas arloji :..............................................................................................

5. Massa KNO3 :..............................................................................................

6. mol KNO3 yang digunakan :..............................................................................................

7. Temperatur air mula-mula :..............................................................................................

8. Temperatur air setelah pelarutan :..............................................................................................

9. Perubahan temperatur (∆T) :...........................................................................................

2. NaOH

1. Massa 1 mol NaOH :...............................................................................................

2. Massa 0,1 mol NaOH :...............................................................................................

3. Massa Gelas arloji + NaOH :...............................................................................................

4. Massa gelas arloji :...............................................................................................

5. Massa NaOH :...............................................................................................

6. mol NaOH yang digunakan :...............................................................................................

7. Temperatur air mula-mula :...............................................................................................

8. Temperatur air setelah pelarutan :...............................................................................................

i. Perubahan temperatur (∆T) :........................................................................................