Plz its urgent
high energy is required for fusion reactions to occur because the nuclei
a. attract each other because they have like charges
b. attract each other because the have unlike charges
c. repel each other because they have unlike charges
d. repel each other because they have like charges

it should be p1 v1 = p2 v2

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.