Question 2 Molecular systems tend to move spontaneously to a state of maximum ra

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Question 2 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, Delta S, depends only on initial and final states. Delta S 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 Delta S must be calculated from the absolute entropy values, s , of the reactants and products: Part A Predict the sign of the entropy change, Delta S , for each of the reaction displayed. Drag the appropriate items to their respective bins. Part B Calculate the standard entropy change for the reaction using the data from the following table: Express your answer to four significant figures and include the appropriate units.

Explanation / Answer

Some data are missing in the provided Table. The S

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