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NEET 2006
Exam
NEET
Year
2006
Subject
Chemistry
Chapter
Thermodynamics (C)

NEET 2006 · Chemistry · Thermodynamics (C)

Assume each reaction is carried out in an open container. For which...

Assume each reaction is carried out in an open container. For which reaction will ΔH=ΔE?\Delta H=\Delta E ?

Options

  1. A2CO(g)+O2( g)→2CO2( g)2 \mathrm{CO}_{(\mathrm{g})}+\mathrm{O}_{2(\mathrm{~g})} \rightarrow 2 \mathrm{CO}_{2(\mathrm{~g})}
  2. BH2(g)+Br2(g)→2HBr(g)\mathrm{H}_{2(g)}+\mathrm{Br}_{2(g)} \rightarrow 2 \mathrm{HBr}_{(\mathrm{g})}
  3. CC(s)+2H2O(g)→2H2(g)+CO2(g)\mathrm{C}_{(\mathrm{s})}+2 \mathrm{H}_2 \mathrm{O}_{(\mathrm{g})} \rightarrow 2 \mathrm{H}_{2(g)}+\mathrm{CO}_{2(g)}
  4. DPCl5(g)→PCl3(g)+Cl2(g)\mathrm{PCl}_{5(g)} \rightarrow \mathrm{PCl}_{3(g)}+\mathrm{Cl}_{2(g)}

Correct answer

B. H2(g)+Br2(g)→2HBr(g)\mathrm{H}_{2(g)}+\mathrm{Br}_{2(g)} \rightarrow 2 \mathrm{HBr}_{(\mathrm{g})}

Step-by-step solution

For2(g)+Br2(g)→2HBr(g)\mathrm{For}_2(g)+\mathrm{Br}_2(g) \rightarrow 2 \mathrm{HBr}(g) ∵\Deltang=0∴ΔH=ΔE+\DeltangRT⇒ΔH=ΔE\begin{array}{ll} \because& \Deltan_g=0 \\ \therefore & \Delta \mathrm{H}=\Delta \mathrm{E}+\Deltan_g \mathrm{RT}\\ \Rightarrow & \Delta \mathrm{H}=\Delta \mathrm{E} \end{array}
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