Achemical reaction that has a positive δg is best described as

Explanation:

G is the symbol used for the Gibss energy, also known as free energy.

G measures the useful energy, i.e. the energy that can be used to perform a work.

G = H - TS and the change in G is given by δG = δH - TδS.

The sign of δG tells if a chemical reaction is spontaneous or not.

If δG is positive the reaction is non-spontaneous, if δG is negative the reaction is spontaneous, and if δG = 0 the reaction is at equilibrium. This can be written as:

Then, as to the given statement, it is completed with the term non-spontaneous, which corresponds to the description of a chemical reaction that has a positive δG.

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.