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For endothermic reaction ans. ΔH is negative ΔH is positive ΔH = 0 ΔU is negative

Question

For endothermic reaction

  • ΔH is negative
  • ΔH is positive
  • ΔH = 0
  • ΔU is negative
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Solution

For an endothermic reaction, ΔH is positive. This is because energy is absorbed from the surroundings into the system, which increases the system's enthalpy.

The other options are incorrect for an endothermic reaction. ΔH is not negative, because that would indicate an exothermic reaction where energy is released. ΔH is also not equal to zero, because that would indicate a reaction where no heat is absorbed or released.

ΔU, which represents the internal energy of the system, could be either positive or negative depending on the specific reaction and conditions. However, in general for an endothermic reaction, if the system absorbs heat and no work is done, ΔU would be positive.

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