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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
Chemical Equilibrium

NTA Abhyas 2020 · Chemistry · Chemical Equilibrium

The equilibrium constant for a reaction A + B ⇋ C + D is 1 × 10 ^ -...

The equilibrium constant for a reaction A+B⇋C+DA + B ⇋ C + D is 1×10−21 \times {10}^{- 2} at 298K298\text{K} and is 22 at 273K.273\text{K}\text{.} The chemical process resulting in the formation of C\text{C} and D\text{D} is:

Options

  1. AExothermic
  2. BEndothermic
  3. CUnpredictable
  4. DThere is no relationship between ΔH\Delta H and K\text{K}

Correct answer

A. Exothermic

Step-by-step solution

\text\log\dfrac{{K}_{2}}{{K}_{1}} = \dfrac{\text{\Delta H}}{2.303\text{R}} \left(\dfrac{1}{{T}_{1}} - \dfrac{1}{{T}_{2}}\right)<br /><br />{T}_{1} > {T}_{2}   and  K2>K1\text{ \text{ and } }{K}_{2}> {K}_{1}

\DeltaH=−Ve\text{\Delta H}\text{=} - \text{Ve}
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