Question

In the reactions

I : H₂ → 2H    ∆H = 436 kJ

II : H₂ + ½O₂→ H₂O    ∆H = -241.81 kJ

III : 2H + ½O₂→H₂O     ∆H = ?

H₂O can be formed either by II or III. Ratio of enthalpy change in III to II is :

a. 2.8

b. 1.2

c. 0.36

d. 0.82

Answer 1

Correct option is a. 2.8