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NEET Chemistry · Hard

Thermodynamics: Hess law MCQ

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Hess lawHardQuestion 23082

Question

If reaction A has ΔH=−100\Delta H = -100 kJ and reaction B has ΔH=+40\Delta H = +40 kJ, combined enthalpy is:

  1. A
    -60 kJ
    Correct
  2. B
    +60 kJ
  3. C
    -140 kJ
  4. D
    +140 kJ

Correct answer

-60 kJ

Explanation

Add algebraically.

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