Which of the following is a statement of Hess's law?

A) If a reaction is carried out in a series of steps, the AH for the reaction will equal the sum of the enthalpy changes for the individual steps.

B) If a reaction is carried out in a series of steps, the AH for the reaction will equal the product of the enthalpy changes for the individual steps.

C) The AH for a process in the forward direction is equal in magnitude and opposite in sign to the AH for the process in the reverse direction.

D) The AH for a process in the forward direction is equal to the AH for the process in the reverse direction.

E) The AH of a reaction depends on the physical states of the reactants and products.

Solutions

Expert Solution

Answer:-

the statement of Hess law,

A). If a reaction is carried out in a series of steps, the H for the reaction will be equal the sum of the enthalpy change for the individual steps.

For example A ——-B H₁

B ——- C H₂

Then for the overall reaction ,

A ———- C H = H₁ + H₂

queen_honey_blossom answered 2 years ago

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