What does a negative ÄGròn tell you about the reaction? The reaction is absorbing heat from the surroundings The system is becoming more disordered. © The reaction is nonspontaneous at that temperature. The reaction is transferring heat to the surroundings The reaction is spontaneous at that temperature. The system is becoming less disordered.

What does a negative ÄGròn tell you about the reaction? The reaction is absorbing heat from the surroundings The system is becoming more disordered. © The reaction is nonspontaneous at that temperature. The reaction is transferring heat to the surroundings The reaction is spontaneous at that temperature. The system is becoming less disordered.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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For which of the following reactions, carried out at constant temperature and pressure does AU = AH? Note: You may ignore work which is not related to gasses. Oa. 2HCI(g) + Mg(s) → MgCl2(s) + H2(g) Ob. O2(g) + N2O5(g) → O3(g) + N½O4(g) Oc. HCI(g) + NH3(g) – NH,CI(s) Od. H20(1) + CaC2(s) → C2H2(g) + Ca(OH)2(s) Oe. 20O2(g) + 4H2O(g) – 302(g) + 2CH;OH()
One mole of an ideal gas is contained in a cylinder with a movable piston. The temperature is constant at 78°C. Weights are removed suddenly from the piston to give the following sequence of three pressures. a. P₁ b. P2 c. P3 = 5.20 atm (initial state) = 2.53 atm = 1.00 atm (final state) What is the total work (in joules) in going from the initial to the final state by way of the preceding two steps? J What would be the total work if the process were carried out reversibly? J
1.) Complete A and B to move on. a.) Write the complete, balanced chemical equation for the following reaction on a separate sheet of paper. Provide products where they are not given. Assume that the reaction is spontaneous. Propane (C3H8) + oxygen → carbon dioxide + water Type the sum of the coefficients in the equation into the answer blank. If there is no coefficient, count it as one. Include ( g, s, l, or aq) b.) Write the complete, balanced chemical equation for the following reaction on a separate sheet of paper. Provide products where they are not given. Assume that the reaction is spontaneous. Diphosphorus pentoxide + water → Type in the coefficient and formula for the product in the equation that contains phosphorus. Include ( g, s, l, or aq)
Endothermic reactions are more likely to be spontaneous. O True O False
13. The enthalpy change, AH, of a process is defined as: The quantity of heat transferred in or out of a system as it undergoes a change at constant pressure. O The increase or decrease in temperature in a system. O The change in molecular disorder in a system. O The maximum amount of useful work that can be done in a system. 14. See image baln
Read the descriptions of physical or chemical changes in the table below. Then decide whether the change will be spontaneous, if you can. Change A gas condenses to a liquid, neither absorbing nor releasing heat. An exothermic chemical reaction between a solid and a liquid results in gaseous products. Two liquids mix, neither absorbing nor releasing heat. Is this change spontaneous? Yes. No. Can't decide with information given. ○ Yes. ○ No. Can't decide with information given. Yes. No. ○ Can't decide with information given.
Consider the reaction: N2(g) + 3 F2(g) –→ 2 NF3(g) AH° = -249 kJ and AS° = -278 J/K at 25°C Calculate AG° and state whether the reaction is reactant favored or product favored at standard conditions. AG° = -166 kJ; the equilibrium composition should favor reactants. AG° = -332 kJ; the equilibrium composition should favor reactants. AG° = -332 kJ; the equilibrium composition should favor products. None of these AG° = -166 kJ; the equilibrium composition should favor products.
Which of the following can NOT be deduced from the value of ArGº for a reaction? Select one: the total energy that is absorbed or released by the system during reaction. the value of the equilibrium constant, K, for the reaction. the amount of work that can be obtained from or is required for a reaction or process under standard conditions. the direction (forwards or reverse) of the spontaneous overall reaction.
General Chemistry 4th Edition McQuarrie • Rock • Gallogly University Science Books presented by Macmillan Learning Consider an ideal gas enclosed in a 1.00 L container at an internal pressure of 24.0 atm. Calculate the work, w, if the gas expands against a constant external pressure of 1.00 atm to a final volume of 24.0 L. w = J Now calculate the work done if this process is carried out in two steps. 1. First, let the gas expand against a constant external pressure of 1.50 atm to a volume of 16.0 L. 2. From the end point of step 1, let the gas expand to 24.0 L against a constant external pressure of 1.00 atm. w = J
Calculate the standard enthalpy change for the reaction at 25 ∘C. Standard enthalpy of formation values can be found in this list of thermodynamic properties. 2CH3OH(g)+3O2(g)----> 2CO2(g)+4H2O(g)
Which is true for the following reaction: N₂(g) + 3H₂(g) 2NH3(g) + heat for the reverse reaction, AH is negative. For the reverse reaction, AS is negative. Enthalpy favors the reactants. Entropy favors the reactants. O
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