1. What are the meaning of negative signs for AG and AS? Positive signs? 2. A chemical reaction will always be spontaneo

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1 What Are The Meaning Of Negative Signs For Ag And As Positive Signs 2 A Chemical Reaction Will Always Be Spontaneo 1 (202.84 KiB) Viewed 75 times

1. What are the meaning of negative signs for AG and AS? Positive signs? 2. A chemical reaction will always be spontaneous if the sign of AH is and the sign of AS is 3. For an isothermal reversible process, the heat flow is given by 4. For a given reaction, AH = -22.6 kJ and AS = -45.2 J/K. If AH and AS are constant with changes in temperature, for what temperature range would the reaction be spontaneous? 5. a) For CH3COOH(1), AH, = -487.0 kJ/mole and AG, = -392.5 kJ/mole. Calculate the free energy change for the preparation of CH3COOH(1) from its elements in their standard states at 77°C. (Assume AH and AS are constant with changes in temperature.) b) Is the reaction spontaneous at 77°C? c) If the reaction is carried out reversibly at 77°C, what is the heat flow? 6. For which of the following processes would the entropy change be positive? a) The sublimation of I₂ b) The combustion of CH₂(g) c) The condensation of water vapor d) The formation of C6H6() from its elements in their standard states 7. Consider the following data: AH, (kJ/mole) AG (kJ/mole) C₂H, (g) -84.7 -32.9 H₂O(1) -285.9 -237.2 CO₂(g) -393.5 -394.4 a) Calculate the entropy change for the combustion of 1.0 mole of C₂H.(g) at 25°C. b) Are the products more or less ordered than the reactants at 25°C? c) Is the reaction spontaneous at 25°C? d) What is the maximum amount of useful work which can be obtained from the process at 25°C? e) If the process is carried out irreversibly at 25°C, under constant volume, what is the heat flow? f) If the process is carried out irreversibly under constant pressure at 25°C, what is the heat flow? g) What is the heat flow if the process is carried out reversibly at 25°C? h) If the process occurs under constant pressure at 25°C, what is the PAV work?