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NEET2023ChemistryThermodynamics (C)Actual

Consider the following reaction: 2 H ₂( ~g )+ O ₂( ~g ) 2 H ₂ O ( g ) _ r H ^ =-483.64 ~kJ . What is the enthalpy change for decomposition of one mole of water? (Choose the right option).

Options

  1. A18 ~kJ
  2. B100 ~kJ
  3. C120.9 ~kJ
  4. D241.82 ~kJ

Correct answer

D. 241.82 ~kJ

Step-by-step solution

2 H ₂ O ( g ) 2 H ₂( ~g )+ O ₂( ~g ) H ^ =483.64 ~kJ For decomposition of 2 moles of H ₂ O , enthalpy change =483.64 ~kJ For decomposition of 1 mole of H ₂ O , enthalpy change = 483.64 2 ~kJ =241.82 ~kJ

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