Question

The heat evolved in the following reation
2H₂ (g) + O₂ (g) → 2H₂O (I), ΔH = -484 kJ
to produce 9 g of water is
(a) 484 kJ
(b) 121x10³ J
(c) 242 kJ
(d) 968 kJ

Answer 1

Hey mate! Here's your answer,

In producing 2moles of H2O, i.e., in producing 36gm of water, heat evolved = -484 kJ

So in producing 1gm of water, heat evolved = -484/36 kJ

Now, in producion of 9gm of water, heat evolved must be = (-484/36)×9

= -121kJ

Hope I've helped you!

#Be_brainly