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Which of the following standard enthalpy of formation values are not zero at 25 oC? Select all that apply. a. Ne(g)b. Hg(l)c. Na(s)d. H(g)e. Ag(s)f. S8(s)(rhombic)

Sagot :

H, S8(monoclinic), as well as Methane are the appropriate responses (g). For these three chemicals, overall enthalpy of production is not zero.

Entropy vs. enthalpy: what are they?

Entropy is the quantity of inherent disorder within a substance, whereas enthalpy is the quantity of internal energy. Enthalpy is greater than 0 for water since it is equal for elemental compounds like hydrogen gas and gaseous oxygen (regardless of phase).

What distinguishes enthalpy from energy?

Enthalpy with internal energy vary primarily in that internal energy is the total of a system's both potential and kinetic energy, whilst enthalpy is indeed the heat absorbed is evolved through chemical processes that take place in a system.

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