which statement about enthalpy is true? the enthalpy of formation for a pure element in its standard state…

which statement about enthalpy is true? the enthalpy of formation for a pure element in its standard state is always positive. the enthalpy of formation for a pure element in its standard state is always negative. enthalpy is a state function because its change depends only on initial and final conditions. enthalpy is not a state function because its change depends on the identities of the reactants and products.

which statement about enthalpy is true? the enthalpy of formation for a pure element in its standard state is always positive. the enthalpy of formation for a pure element in its standard state is always negative. enthalpy is a state function because its change depends only on initial and final conditions. enthalpy is not a state function because its change depends on the identities of the reactants and products.

Answer

Brief Explanations:

  1. The enthalpy of formation for a pure element in its standard state is defined as zero, not positive or negative.
  2. Enthalpy is a state - function. A state - function's change depends only on the initial and final states of the system, not on the path taken between them. So, its change depends only on initial and final conditions, not on the identities of reactants and products in the sense of the path taken.

Answer:

Enthalpy is a state function because its change depends only on initial and final conditions.