Consider the gas- phase reaction between nitric oxide and bromine at 273^ C i 2 NO(g)+Br 2 (g) longrightarrow2 NOBr(g) The following data for the initial rate of appearance of NOBr were obtained Experiment (M / s) [NO](M) 0.10 [Br 2 ](M) 0.20 Initial Rate 24 1 2 0.25 0.20 150 3 0.10 0.50 60 4 0.350.50 735 (a) Determine the rate law. (b) Calculate the average value of the rate constant for the appearance of NOBr from the four data sets. (c) How is the rate of appearance of NOBr related to the rate of disappearance of Br 2 ? () What is the rate of disappearance of Br 2 when [NO] = 0.075M and [Br 2 ]=0.25M

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.

explanation: