Question

The enthalpies of all elements in their standard state at ${25}^{\circ }C$ are taken to be zero.

• A. True
• B. False

Answer 1

The correct option is A True

The enthalpies of all elements in their standard state at ${25}^{o}C$ are taken to be zero.
All elements in their standard state have enthhalpy of formation zero as they are in stable state and there is no change involved in their formation.
Thus, the given statement is true.