Chemistry · 2011
NEET 2011 · Prelims · Code A · Q69
Enthalpy change for the reaction, 4 H_( g ) → 2 H_2( g ) is -869.6 kJ The dissociation energy of H-H bond is:
Enthalpy change for the reaction,
$$4 \mathrm{H}_{(\mathrm{g})} \rightarrow 2 \mathrm{H}_{2(\mathrm{~g})} \text { is }-869.6 \mathrm{~kJ}
$$
The dissociation energy of H-H bond is :
Official answer
(4)
+$\displaystyle 434.8$ kJ
More from Thermodynamics
- Match List I with List II. Choose the correct answer from the options given below:2024
- For a sample of perfect gas when its pressure is changed isothermally from p_i to p_f, the entropy change is given by2016
- In which case change in entropy is negative?2019
- The standard heat of formation, in kcal / mol of Ba^2+ is: [Given: standard heat of formation of SO_4^2- ion (aq)=-216 kcal / mol, standard heat of…2025
- In which of the following processes entropy increases? A. A liquid evaporates to vapour. B. Temperature of a crystalline solid lowered from 130 K to…2024
- At a certain temperature, T(K), during a process, 500 J is absorbed by the system and work of 200 J is done by the system. Then change in internal…2026
- For a given reaction, Δ H=35.5 kJ mol^-1 and Δ S=83.6 JK^-1 mol^-1. The reaction is spontaneous at: (Assume that Δ H and Δ S do not vary with…2017
- Which amongst the following options is the correct relation between change in enthalpy and change in internal energy?2023
NEET (UG) 2011 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.