Consider an electrochemical cell constructed from the following half cells, linked by a KCl salt bridge.

• a Fe electrode in 1.0 M FeCl2 solution

• a Ni electrode in 1.0 M Ni(NO3)2 solution

When the cell is running spontaneously, which choice includes only true statements and no false ones?

A) The nickel electrode loses mass and the nickel electrode is the cathode.
B) The nickel electrode gains mass and the nickel electrode is the cathode.
C) The iron electrode gains mass and the iron electrode is the anode.
D) The iron electrode loses mass and the iron electrode is the cathode.

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.

level 4 to level 2 : ))