Suppose you had a sample of CH4 in a balloon. Assuming the balloon starts out to be the same size as the He and Ar balloon in the diagram, what would you predict about its volume at the end?​

that's what i got you can count the number of atoms

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.

catya your not at all which answer i've seen you do this on another question!