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JEE Mains · Chemistry · STD 11 - 5. Thermodynamics and thermochemistry

निम्न अभिक्रियाओं में से किसमें, \(\Delta H\) का मान \(\Delta U\) के बराबर है ?

  1. A \({N_2}(g) + 3{H_2}(g) \to 2N{H_3}(g)\)
  2. B \(2HI(g) \to H_2(g) + I_2(g)\)
  3. C \(2SO_2 (g) + O_2 (g) \to 2SO_3 (g)\)
  4. D \(2NO_2 (g) \to N_2O_4 (g)\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(2HI(g) \to H_2(g) + I_2(g)\)

Step-by-step Solution

Detailed explanation

\(\Delta H = \Delta U + \Delta {n_g}RT\) \(2HI(g) \to {H_2}(g) + {I_2}(g);\Delta {n_g} = (1 + 1) - 2 = 0\) \(\therefore \,\Delta H = \Delta U + 0\)
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