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.

Which definition describes enthalpy?

enthalpy, the sum of the internal energy and the product of the pressure and volume of a thermodynamic system. ... According to the law of energy conservation, the change in internal energy is equal to the heat transferred to, less the work done by, the system.

What does the enthalpy tell us?

Enthalpy is the heat content of a system. The enthalpy change of a reaction is roughly equivalent to the amount of energy lost or gained during the reaction. A reaction is favored if the enthalpy of the system decreases over the reaction.