In the given reaction, H 2(g) longrightarrow 2 H (g) ; Δ H=435.0 kJ mol -1 The enthalpy change is known as

Question

In the given reaction, H 2(g) longrightarrow 2 H (g) ; Δ H=435.0 kJ mol -1 The enthalpy change is known as (A) enthalpy of formation (B) enthalpy of atomisation (C) bond dissociation enthalpy (D) Both (b) and (c)

Tardigrade Admin · Accepted Answer

In the reaction, H 2(g) longrightarrow 2 H (g) ; Δa H°=435 kJ mol -1 H-atoms are formed by breaking H - H bond in dihydrogen. The enthalpy change in this process is known as enthalpy of atomisation, Δa H°. In case of diatomic molecules like dihydrogen, the enthalpy of atomisation is also known as bond dissociation enthalpy.

Q. In the given reaction, H2​(g)⟶2H(g);ΔH=435.0kJmol−1 The enthalpy change is known as

enthalpy of formation

enthalpy of atomisation

bond dissociation enthalpy

Both (b) and (c)

Q. In the given reaction,
$H_{2} (g) ⟶ 2 H (g); Δ H = 435.0 k J m o l^{- 1}$ The enthalpy change is known as