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Thermodynamics question

2003 · Shift 0 · Q3
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Thermodynamics question

2003 · Shift 0 · Q3

JEE MainChemistryThermodynamicsMCQ+4 / −1
If at 298 K the bond energies of C - H, C - C, C = C and H - H bonds are respectively 414, 347, 615 and 435 kJ/mol, the value of enthalpy change for the reaction H2C=CH2H_2C=CH_2H2​C=CH2​(g) + H2H_2H2​(g) →\to→ H3C−CH3H_3C-CH_3H3​C−CH3​(g) at 298 K will be :
  1. A
    - 250 kJ
  2. B
    + 125 kJ
  3. C
    - 125 kJ
  4. D
    + 250 kJ
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