O2 + 2H2 → 2H2O

Ba(OH)2 (s) + 2NH4Cl (s) → 2H2O + 2NH3 (g) + Ba2+

(aq) + 2Cl– (aq)

2K (s) + 2H2O → 2K+

(aq) + 2OH– (aq) + H2 (g)

Disorder created insurroundings

Disorder created insystem

O2 + 2H2 → 2H2O irreversible

Ba(OH)2 (s) + 2NH4Cl (s) → 2H2O + 2NH3 (g) + Ba2+

(aq) + 2Cl– (aq)

irreversible

2K (s) + 2H2O → 2K+

(aq) + 2OH– (aq) + H2 (g)

irreversible

Disorder created insurroundings

Disorder created insystem

O2 + 2H2 → 2H2O irreversible

Ba(OH)2 (s) + 2NH4Cl (s) → 2H2O + 2NH3 (g) + Ba2+

(aq) + 2Cl– (aq)

irreversible

2K (s) + 2H2O → 2K+

(aq) + 2OH– (aq) + H2 (g)

irreversible2K+

(aq) + 2OH– (aq) + H2 (g) →2K (s) + 2H2O

Disorder created insurroundings

Disorder created insystem

O2 + 2H2 → 2H2O irreversible

Ba(OH)2 (s) + 2NH4Cl (s) → 2H2O + 2NH3 (g) + Ba2+

(aq) + 2Cl– (aq)

irreversible

2K (s) + 2H2O → 2K+

(aq) + 2OH– (aq) + H2 (g)

irreversible2K+

(aq) + 2OH– (aq) + H2 (g) →2K (s) + 2H2Oimpossible

Disorder created insurroundings

Disorder created insystem

O2 + 2H2 → 2H2O irreversible

Ba(OH)2 (s) + 2NH4Cl (s) → 2H2O + 2NH3 (g) + Ba2+

(aq) + 2Cl– (aq)

irreversible

2K (s) + 2H2O → 2K+

(aq) + 2OH– (aq) + H2 (g)

irreversible2K+

(aq) + 2OH– (aq) + H2 (g) →2K (s) + 2H2Oimpossible

Disorder created insurroundings

Disorder created insystem

N2 + 3H2 → 2NH3

O2 + 2H2 → 2H2O irreversible

Ba(OH)2 (s) + 2NH4Cl (s) → 2H2O + 2NH3 (g) + Ba2+

(aq) + 2Cl– (aq)

irreversible

2K (s) + 2H2O → 2K+

(aq) + 2OH– (aq) + H2 (g)

irreversible2K+

(aq) + 2OH– (aq) + H2 (g) →2K (s) + 2H2Oimpossible

Disorder created insurroundings

Disorder created insystem

N2 + 3H2 → 2NH3

O2 + 2H2 → 2H2O irreversible

Ba(OH)2 (s) + 2NH4Cl (s) → 2H2O + 2NH3 (g) + Ba2+

(aq) + 2Cl– (aq)

irreversible

2K (s) + 2H2O → 2K+

(aq) + 2OH– (aq) + H2 (g)

irreversible2K+

(aq) + 2OH– (aq) + H2 (g) →2K (s) + 2H2Oimpossible

Disorder created insurroundings

Disorder created insystem

N2 + 3H2 → 2NH3

N2 + 3H2 ← 2NH3

forward

backward

O2 + 2H2 → 2H2O irreversible

Ba(OH)2 (s) + 2NH4Cl (s) → 2H2O + 2NH3 (g) + Ba2+

(aq) + 2Cl– (aq)

irreversible

2K (s) + 2H2O → 2K+

(aq) + 2OH– (aq) + H2 (g)

irreversible2K+

(aq) + 2OH– (aq) + H2 (g) →2K (s) + 2H2Oimpossible

Disorder created insurroundings

Disorder created insystem

N2 + 3H2 → 2NH3

N2 + 3H2 ← 2NH3

The reaction occurs reversibly.

forward

backward