1. The sun's diameter is approximately 1.4 x 10° km, and the Earth's is just under 1.3 x 104 km. The Milky Way is about
9.5 x 10" km across. Which statement is true?
a. The sun is 2 times wider than Earth; the Milky Way is 11
times wider than the sun.
b. The sun is 100 orders of magnitude wider than Earth;
the Milky Way is 100 billion orders of magnitude wider
than the sun.
c. The sun is 2 AU wider than Earth; the Milky Way is 11
light-years wider than the sun.
d. The sun is 2 orders of magnitude wider than Earth; the
Milky Way is 12 orders of magnitude wider than the
sun.

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.

c. electrical charges of ionic bonds.