Chemistry: Principles and Practice
3rd Edition
ISBN: 9780534420123
Author: Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher: Cengage Learning
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Chapter 17, Problem 17.15QE
Interpretation Introduction
Interpretation:
In the statement, ‘since there is no detectable chemical change when methane and oxygen mix, the reaction of these two substances is not spontaneous’; the statement has to be corrected and explained.
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Chemistry: Principles and Practice
Ch. 17 - Prob. 17.1QECh. 17 - How is the sign of q, heat, defined? How does it...Ch. 17 - Identify the sign of the work when a fuel-oxygen...Ch. 17 - What is the sign of the work when a refrigerator...Ch. 17 - When a rocket is launched, the burning gases are...Ch. 17 - Prob. 17.6QECh. 17 - Prob. 17.7QECh. 17 - Prob. 17.8QECh. 17 - Prob. 17.9QECh. 17 - Explain why absolute enthalpies and energies...
Ch. 17 - Explain why absolute entropies can be measured.Ch. 17 - Under what conditions is the entropy of a...Ch. 17 - Prob. 17.13QECh. 17 - Prob. 17.14QECh. 17 - Prob. 17.15QECh. 17 - Prob. 17.16QECh. 17 - Prob. 17.17QECh. 17 - Prob. 17.18QECh. 17 - The free energy for a reaction decreases as...Ch. 17 - The equilibrium constant for a reaction decreases...Ch. 17 - When solid sodium acetate crystallizes from a...Ch. 17 - Prob. 17.22QECh. 17 - Prob. 17.23QECh. 17 - Prob. 17.24QECh. 17 - Prob. 17.25QECh. 17 - Prob. 17.26QECh. 17 - Prob. 17.27QECh. 17 - Calculate w for the following reactions that occur...Ch. 17 - How much work is done if a balloon expands from...Ch. 17 - Prob. 17.30QECh. 17 - Prob. 17.31QECh. 17 - A piston initially contains 688 mL of gas at 1.22...Ch. 17 - A 220-L cylinder contains an ideal gas at a...Ch. 17 - Prob. 17.34QECh. 17 - Prob. 17.35QECh. 17 - For a process, w = 34 J and q = 109 J. What is E...Ch. 17 - Prob. 17.37QECh. 17 - Prob. 17.38QECh. 17 - A reaction between a solid and a liquid produces...Ch. 17 - Prob. 17.40QECh. 17 - Prob. 17.41QECh. 17 - When an ideal gas is compressed at constant...Ch. 17 - Prob. 17.43QECh. 17 - Prob. 17.44QECh. 17 - Prob. 17.45QECh. 17 - Prob. 17.46QECh. 17 - Prob. 17.47QECh. 17 - Prob. 17.48QECh. 17 - What is the sign of the entropy change for each of...Ch. 17 - For each process, tell whether the entropy change...Ch. 17 - Prob. 17.51QECh. 17 - Prob. 17.52QECh. 17 - Prob. 17.53QECh. 17 - Prob. 17.54QECh. 17 - Use the data in Appendix G to calculate the...Ch. 17 - Prob. 17.56QECh. 17 - Prob. 17.57QECh. 17 - Prob. 17.58QECh. 17 - Calculate G for the following reactions and state...Ch. 17 - Prob. 17.60QECh. 17 - Prob. 17.63QECh. 17 - Prob. 17.64QECh. 17 - Prob. 17.65QECh. 17 - Prob. 17.66QECh. 17 - What is the sign of the standard Gibbs free-energy...Ch. 17 - What is the sign of the standard Gibbs free-energy...Ch. 17 - What is the sign of the standard Gibbs free-energy...Ch. 17 - What is the sign of the standard Gibbs free-energy...Ch. 17 - Predict the temperature at which the reaction in...Ch. 17 - Prob. 17.72QECh. 17 - Prob. 17.73QECh. 17 - Prob. 17.74QECh. 17 - Prob. 17.75QECh. 17 - Prob. 17.76QECh. 17 - Prob. 17.77QECh. 17 - Prob. 17.78QECh. 17 - Prob. 17.79QECh. 17 - Prob. 17.80QECh. 17 - Prob. 17.81QECh. 17 - Determine whether the condensation of nitromethane...Ch. 17 - At 298 K, G = 70.52 kJ for the reaction 2NO(g) +...Ch. 17 - Prob. 17.84QECh. 17 - Prob. 17.85QECh. 17 - Prob. 17.86QECh. 17 - Prob. 17.87QECh. 17 - Prob. 17.88QECh. 17 - For each reaction, an equilibrium constant at 298...Ch. 17 - For each reaction, an equilibrium constant at 298...Ch. 17 - Prob. 17.91QECh. 17 - Use the data in Appendix G to calculate the value...Ch. 17 - Suppose you have an endothermic reaction with H =...Ch. 17 - Suppose you have an endothermic reaction with H =...Ch. 17 - Suppose you have an exothermic reaction with H =...Ch. 17 - Suppose you have an exothermic reaction with H =...Ch. 17 - Calculate G and G at 303 C for the following...Ch. 17 - Calculate G and G at 37 C for the following...Ch. 17 - Prob. 17.101QECh. 17 - Prob. 17.102QECh. 17 - A 220-ft3 sample of gas at standard temperature...Ch. 17 - What is the sign of the standard Gibbs free-energy...Ch. 17 - Elemental boron, in the form of thin fibers, can...Ch. 17 - Calculate the standard Gibbs free-energy change...Ch. 17 - The thermite reaction is 2Al(s) + Fe2O3(s) ...Ch. 17 - Chemists and engineers who design nuclear power...
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- For each of the following processes, identify the systemand the surroundings. Identify those processes that arespontaneous. For each spontaneous process, identify theconstraint that has been removed to enable the process to occur: Ammonium nitrate dissolves in water. Hydrogen and oxygen explode in a closed bomb. A rubber band is rapidly extended by a hangingweight. The gas in a chamber is slowly compressed by aweighted piston. A glass shatters on the floor.arrow_forwardDefine the following: a. spontaneous process b. entropy c. positional probability d. system e. surroundings f. universearrow_forwardFor the reaction NO(g)+NO2(g)N2O3(g) , use tabulated thermodynamic data to calculate H and S. Then use those values to answer the following questions. (a) Is this reaction spontaneous at 25°C? Explain your answer. (b) If the reaction is not spontaneous at 25°C, will it become spontaneous at higher temperatures or lower temperatures? (c) To show that your prediction is accurate, choose a temperature that corresponds to your prediction in part (b) and calculate G . (Assume that both enthalpy and entropy are independent of temperature.)arrow_forward
- Coal is used as a fuel in some electric-generating plants. Coal is a complex material, but for simplicity we may consider it to be a form of carbon. The energy that can be derived from a fuel is sometimes compared with the enthalpy of the combustion reaction: C(s)+O2(g)CO2(g) Calculate the standard enthalpy change for this reaction at 25C. Actually, only a fraction of the heat from this reaction is available to produce electric energy. In electric generating plants, this reaction is used to generate heat for a steam engine, which turns the generator. Basically the steam engine is a type of heat engine in which steam enters the engine at high temperature (Th), work is done, and the steam then exits at a lower temperature (Tl). The maximum fraction, f, of heat available to produce useful energy depends on the difference between these temperatures (expressed in kelvins), f = (Th Tl)/Th. What is the maximum heat energy available for useful work from the combustion of 1.00 mol of C(s) to CO2(g)? (Assume the value of H calculated at 25C for the heat obtained in the generator.) It is possible to consider more efficient ways to obtain useful energy from a fuel. For example, methane can be burned in a fuel cell to generate electricity directly. The maximum useful energy obtained in these cases is the maximum work, which equals the free-energy change. Calculate the standard free-energy change for the combustion of 1.00 mol of C(s) to CO2(g). Compare this value with the maximum obtained with the heat engine described here.arrow_forward2. Which of the following is true for a spontaneous process but not for a nonspontaneous process? Energy in the universe is concentrated conserved dispersed not conservedarrow_forwardThermodynamics provides a way to interpret everyday occurrences. If you live in northern climates, one common experience is that during early winter, snow falls but then melts when it hits the ground. Both the formation and the melting happen spontaneously. How can thermodynamics explain both of these seemingly opposed events?arrow_forward
- What is the second law of thermodynamics? For any process, there are four possible sign combinations for Ssys and Ssurr. Which sign combination(s) always give a spontaneous process? Which sign combination(s) always give a non-spontaneous process? Which sign combination(s) may or may not give a spontaneous process?arrow_forwardSolid NH4NO3 is placed in a beaker containing water at 25 C. When the solid has completely dissolved, the temperature of the solution is 23.5 C. (a) Was the process exothermic or endothermic? (b) Was the process spontaneous? (c) Did the entropy of the system increase? (d) Did the entropy of the universe increase?arrow_forwardWhat happens to the entropy of the universe during a spontaneous process?arrow_forward
- Enthalpy changes often help predict whether or not a process will be spontaneous. What type of reaction is more likely to be spontaneous: an exothermic or an endothermic one? Provide two examples that support your assertion and one counterexample.arrow_forwardIndicate whether the following processes are spontaneous or nonspontaneous. (a) Liquid water freezing at a temperature below its freezing point (b) Liquid water freezing at a temperature above its freezing point (c) The combustion of gasoline (d) A ball thrown into the air (e) A raindrop falling to the ground (f) Iron rusting in a moist atmospherearrow_forwardWhat is the sign of the standard Gibbs free-energy change at low temperatures and at high temperatures for the explosive decomposition of TNT? Use your knowledge of TNT and the chemical equation, particularly the phases, to answer this question. (Thermodynamic data for TNT are not in Appendix G.) 2C7H5N3O6(s) 3N2(g) + 5H2O() + 7C(s) + 7CO(g)arrow_forward
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