How does conduction transport heat through a steel rod that is placed in a fire?
A. Energy spreads from one end of the rod to the other through
molecular collisions.
O B. Hot steel molecules move down the molecular matrix toward the
cool end of the rod.
C. Higher velocities of warmer steel molecules cause them to travel
from one end to the other.
D. Waves of electromagnetic energy travel down the steel rod from
one end to the other.

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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.