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AP EAMCET2004ChemistryThermodynamics (C)

Average C - H bond energy is 416 ~kJ ~mol ⁻¹ . Which of the following is correct?

Options

  1. ACH ₄(g)+416 ~kJ C (g)+4 H (g)
  2. BCH ₄(g) C (g)+4 H (g)+416 ~kJ
  3. CCH ₄(g)+1664 ~kJ C (g)+4 H (g)
  4. DCH ₄(g) C (g)+4 H (g)+1664 ~kJ

Correct answer

C. CH ₄(g)+1664 ~kJ C (g)+4 H (g)

Step-by-step solution

CH ₄ has four C - H bonds. So, 4 416=1664 ~kJ is required to break CH ₄ into C and 4 H .

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