General rules in predicting entropy change of the system: 1. If the reaction produces more gas...
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General rules in predicting entropy change of the system: 1. If the reaction produces more gas molecules than it consumes, ASº is positive. 2. If the total number of gas molecules diminishes, AS° is negative. 3. If there is no net change in the total number of gas molecules, AS° may be positive or negative, but will be relatively small numerically. NEGATIVE POSITIVE Decrease in number of gas molecules Increase in number of gas molecules Increase in entropy Solid converted to liquid Solid converted to gas Liquid converted to gas Decrease in entropy Gas converted to solid Gas converted to liquid Liquid converted to solid Directions: Predict whether the entropy change of the system in each of the following is positive or negative. Chemical Reaction Positive/ Reason Negative 1.02(g) 20(g) 2. N2(g, 10atm) → N2(g, 1atm) 3.6CO2(g) +6H20(g) → CoH12O6(g) + 602(g) 4.2H2(g) + O2(g) → 2H2O(1) 5.NH4CI(s) > NH3(g) + HCI(g) General rules in predicting entropy change of the system: 1. If the reaction produces more gas molecules than it consumes, ASº is positive. 2. If the total number of gas molecules diminishes, AS° is negative. 3. If there is no net change in the total number of gas molecules, AS° may be positive or negative, but will be relatively small numerically. NEGATIVE POSITIVE Decrease in number of gas molecules Increase in number of gas molecules Increase in entropy Solid converted to liquid Solid converted to gas Liquid converted to gas Decrease in entropy Gas converted to solid Gas converted to liquid Liquid converted to solid Directions: Predict whether the entropy change of the system in each of the following is positive or negative. Chemical Reaction Positive/ Reason Negative 1.02(g) 20(g) 2. N2(g, 10atm) → N2(g, 1atm) 3.6CO2(g) +6H20(g) → CoH12O6(g) + 602(g) 4.2H2(g) + O2(g) → 2H2O(1) 5.NH4CI(s) > NH3(g) + HCI(g)
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The entropy change positivenegative alongwith reasons is listed below SNo Entropy chan... View the full answer
Related Book For
Chemistry The Central Science
ISBN: 978-0321696724
12th edition
Authors: Theodore Brown, Eugene LeMay, Bruce Bursten, Catherine Murphy, Patrick Woodward
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