Percobaan 1
Tujuan : Menentukan Entalpi Pelarutan KNO3 dan NaOH dalam air
Alat dan Bahan
Neraca
Termometer (-10 - 100 0C)
Gelas Polistirena/ gelas plastik/kalori meter
Gelas Ukur 100 mL
Gelas arloji
KNO3 padat
NaOH padat
Cara Kerja
Hitung massa 0,1 mol KNO3
Tambahkan 100 mL air ke gelas plastik dan catat suhunya
Timbang 0,1 mol KNO3 dengan gelas arloji
Segera masukkan ke dalam gelas plastilk
Aduk dengan termometer lalu catat suhu paling rendah yang dicapai
Cuci kalorimeter dan ulangi dengan 0,1 mol NaOH
Catat hasil percobaan pada lembar pengamatan
Pengamatan
KNO3
Massa 1 mol KNO3 :..............................................................................................
Massa 0,1 mol KNO3 :..............................................................................................
Massa Gelas arloji + KNO3 :..............................................................................................
Massa gelas arloji :..............................................................................................
Massa KNO3 :..............................................................................................
mol KNO3 yang digunakan :..............................................................................................
Temperatur air mula-mula :..............................................................................................
Temperatur air setelah pelarutan :..............................................................................................
Perubahan temperatur (∆T) :...........................................................................................
NaOH
Massa 1 mol NaOH :...............................................................................................
Massa 0,1 mol NaOH :...............................................................................................
Massa Gelas arloji + NaOH :...............................................................................................
Massa gelas arloji :...............................................................................................
Massa NaOH :...............................................................................................
mol NaOH yang digunakan :...............................................................................................
Temperatur air mula-mula :...............................................................................................
Temperatur air setelah pelarutan :...............................................................................................
i. Perubahan temperatur (∆T) :........................................................................................
Neraca
Termometer (-10 - 100 0C)
Gelas Polistirena/ gelas plastik/kalori meter
Gelas Ukur 100 mL
Gelas arloji
KNO3 padat
NaOH padat
Hitung massa 0,1 mol KNO3
Tambahkan 100 mL air ke gelas plastik dan catat suhunya
Timbang 0,1 mol KNO3 dengan gelas arloji
Segera masukkan ke dalam gelas plastilk
Aduk dengan termometer lalu catat suhu paling rendah yang dicapai
Cuci kalorimeter dan ulangi dengan 0,1 mol NaOH
Catat hasil percobaan pada lembar pengamatan
KNO3
Massa 1 mol KNO3 :..............................................................................................
Massa 0,1 mol KNO3 :..............................................................................................
Massa Gelas arloji + KNO3 :..............................................................................................
Massa gelas arloji :..............................................................................................
Massa KNO3 :..............................................................................................
mol KNO3 yang digunakan :..............................................................................................
Temperatur air mula-mula :..............................................................................................
Temperatur air setelah pelarutan :..............................................................................................
Perubahan temperatur (∆T) :...........................................................................................
NaOH
Massa 1 mol NaOH :...............................................................................................
Massa 0,1 mol NaOH :...............................................................................................
Massa Gelas arloji + NaOH :...............................................................................................
Massa gelas arloji :...............................................................................................
Massa NaOH :...............................................................................................
mol NaOH yang digunakan :...............................................................................................
Temperatur air mula-mula :...............................................................................................
Temperatur air setelah pelarutan :...............................................................................................