What happens to the rate of a reaction as the reaction
progresses?
O A. The rate stays constant throughout the reaction.
O B. The rate increases as products are formed.
O C. The rate is constant until it suddenly drops to zero.
O D. The rate decreases as reactants are used up.

i'm assuming that it's c.) red bank..

the product of the pressure and volume is also constant

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.