Interpretation:
One example of the process where matter spread is a driving force and one example where energy spread is the driving force should be determined.
Concept Introduction:
Energy is the ability to do work or produce heat. The law of conservation of energy says that theenergy cannot be created or destroyed, but it can be converted from one type to another. It is also called the first law of
There are two driving forces in nature namely energy and matter spread. These driving forces are responsible for affecting the reaction to go to completion. Energy spread is the concentratedenergy which disperses widely. It is always for an exothermic reaction. Molecules spread meansmolecules spread to occupy a large volume.
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Chapter 10 Solutions
Introductory Chemistry: A Foundation
- Determine whether the statements given below are true or false. Consider an endothermic process taking place in a beaker at room temperature. (a) Heat flows from the surroundings to the system. (b) The beaker is cold to the touch. (c) The pressure of the system decreases. (d) The value of q for the system is positive.arrow_forwardDescribe the interconversions of potential and kinetic energy in a moving pendulum. A moving pendulum eventually comes to rest. Has the energy been lost? If not, what has happened to it?arrow_forwardExplain the economic importance of conversions between different forms of energy and the inevitability of losses in this process.arrow_forward
- Consider the following reaction in the vessel described in Question 57. A(g)+B(g)C(s)For this reaction, E=286 J, the piston moves up and the system absorbs 388 J of heat from its surroundings. (a) Is work done by the system? (b) How much work?arrow_forwardAs a child plays on a swing, at what point in her movement is her kinetic energy the greatest? At what point is potential energy at its maximum?arrow_forwardDefine heat. What are its units? How does it differ from energy?arrow_forward
- In the process of isolating iron from its ores, carbon monoxide reacts with iron(III) oxide, as described by the following equation: Fe2O3(s)+3CO(g)2Fe(s)+3CO2(g)H=24.8kJ The enthalpy change for the combustion of carbon monoxide is 2CO(g)+O2(g)2CO2(g)H=566kJ Use this information to calculate the enthalpy change for the equation 4Fe(s)+3O2(g)2Fe2O3(s)H=?arrow_forwardA rebreathing gas mask contains potassium superoxide, KO2, which reacts with moisture in the breath to give oxygen. 4KO2(s)+2H2O(l)4KOH(s)+3O2(g) Estimate the grams of potassium superoxide required to supply a persons oxygen needs for one hour. Assume a person requires 1.00 102 kcal of energy for this time period. Further assume that this energy can be equated to the heat of combustion of a quantity of glucose, C6H12O6, to CO2(g) and H2O(l). From the amount of glucose required to give 1.00 102 kcal of heat, calculate the amount of oxygen consumed and hence the amount of KO2 required. The ff0 for glucose(s) is 1273 kJ/mol.arrow_forwardThe equation for the fermentation of glucose to alcohol and carbon dioxide is: C6H12O6(aq) 2C2H5OH(aq) + 2CO2(g) The enthalpy change for the reaction is 67 kJ. Is this reaction exothermic or endothermic? Is energy, in the form of heat, absorbed or evolved as the reaction occurs?arrow_forward
- How much heat is evolved when 1255 g of water condensesto a liquid at 100°C?arrow_forwardHow much heat is required to raise the temperature of 100. grams of water from 25C near room temperature to 100.C its boiling point? The specific heat of water is approximately 4.2Jperg-K. a.3.2104J b.32J c.4.2104J d.76Jarrow_forwardThe combustion of methane, is an exothermic process. Therefore, the products of this reaction must possess (higher/ lower) total potential energy than do the reactants.arrow_forward
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