Molecular systems tend to move spontaneously to a state of

Last updated: 5/3/2023

Molecular systems tend to move spontaneously to a state of maximum randomness or disorder Molecular randomness or disorder is called entropy and is denoted by the symbol S As a state function entropy change AS depends only on initial and final states AS has a positive value when disorder increases and a negative value when disorder decreases The following conditions usually result in an increase in entropy a change of phase solid liquid gas an increase in the number of gas molecules or a solid dissolving to form a solution Although the sign of the entropy change can be predicted as described above the actual value of AS must be calculated from the absolute entropy values S of the reactants and products AS S products S reactants Submit Part B Calculate the standard entropy change for the reaction using the data from the following table 2Mg s O g 2MgO s Substance AH kJ mol AG kJ mol S J K mol Mg s 32 70 O2 g MgO s A 0 00 0 00 602 0 0 00 0 00 569 6 205 0 Express your answer to four significant figures and include the appropriate units View Available Hint s 27 00