The enthalpies of the elements in their standard states are assumed to be

Question

The enthalpies of the elements in their standard states are assumed to be (A) Zero at 298 K (B) Unit at 298 K (C) Zero at all temperature (D) Zero at 273 K

Tardigrade Admin · Accepted Answer

The enthalpies of the elements in their standard states are assumed to be zero at

298 K

If natural form of elements is present then they have zero enthalpy of formation.
For example: dioxygen gas, dinitrogen gas, carbon in graphite are having zero enthalpy.

Q. The enthalpies of the elements in their standard states are assumed to be

Zero at 298 K

Unit at 298 K

Zero at all temperature

Zero at 273 K

The enthalpies of the elements in their standard states are assumed to be zero at 298K If natural form of elements is present then they have zero enthalpy of formation. For example: dioxygen gas, dinitrogen gas, carbon in graphite are having zero enthalpy.

The enthalpies of the elements in their standard states are assumed to be zero at $298 K$
If natural form of elements is present then they have zero enthalpy of formation.
For example: dioxygen gas, dinitrogen gas, carbon in graphite are having zero enthalpy.