*tentukan volume 0,2 mol gas H2 jika diukur pada a.keadaan standar STP b.suhu 27°C dan tekanan 0,5 ATM c.suhu dan tekanan sama ketika 2 mol gas N2 mempunyai volume 6 Liter

*tentukan volume 0,2 mol gas H2 jika diukur pada
a.keadaan standar STP
b.suhu 27°C dan tekanan 0,5 ATM
c.suhu dan tekanan sama ketika 2 mol gas N2 mempunyai volume 6 Liter

Jawaban : volume gas H2 sebagai berikut
a. 4,48 L
b. 9,84 L
c. 0,6 L

Volume gas dapat dihitung dengan konsep mol pada STP, persamaan gas ideal, dan hipotesis Avogadro.
a. pada STP
V = mol x 22,4 L/mol
V = 0,2 mol x 22,4 L/mol
V = 4,48 L

b. pada suhu 27 °C dan tekanan 0,5 atm
P x V = n x R x T
V = n x R x T / P
V = 0,2 mol x 0,082 L.atm/mol.K x 300 K / 0,5 atm
V = 9,84 L

c. pada kondisi 2 mol gas N2 bervolume 6 L
mol H2/V H2 = mol N2/V N2
V H2 = mol H2/mol N2 x V N2
V H2 = 0,2 mol/2 mol x 6 L
V H2 = 0,6 L

Jadi, volume gas H2 berturut-turut adalah 4,48 L, 9,84 L, dan 0,6 L.

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