(a) ΔS
(b) Δ H
(c) ΔG
(d) None
(b) Δ H
(c) ΔG
(d) None
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S refers to entropy - Entropy often refers to the energy content of a process that CAN NOT be recovered. It is also described as chaos.
H refers to enthalpy - Enthalpy measures the total energy in a thermodynamic system, this includes the energy produced by a reaction and the energy needed to create a reaction. The sign of the reaction will tell you whether it is exothermic or endothermic.
G refers to Gibbs Free Energy - Gibbs Free Energy is the energy associated with a chemical reaction that can be used to do work, i.e. your answer. It is defined by H - TS, where T is temperature in Kelvin. The sign of G can tell you if a given reaction is spontaneous or not.
H refers to enthalpy - Enthalpy measures the total energy in a thermodynamic system, this includes the energy produced by a reaction and the energy needed to create a reaction. The sign of the reaction will tell you whether it is exothermic or endothermic.
G refers to Gibbs Free Energy - Gibbs Free Energy is the energy associated with a chemical reaction that can be used to do work, i.e. your answer. It is defined by H - TS, where T is temperature in Kelvin. The sign of G can tell you if a given reaction is spontaneous or not.