Interpretation:
The change in energy stored in the gasoline on driving the car should be explained. It should be explained if the energy stored in the gasoline can be reused once it is dispersed to the environment.
Concept Introduction:
The total energy of the universe is a constant. It means that the energy cannot be created or destroyed. This principle is known as the “Conservation of energy”. There are principle sources of energy as well as different forms of energy or types of energy. The energy stored in a given system is known as “potential energy” whereas the energy possessed by a moving body is known as “kinetic energy”. However, both natural and human processes energy forms can be converted from one form to another form in order to do useful work. Energy is a measure of the ability to do work on the surroundings or by the surroundings.
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Chapter 10 Solutions
Introductory Chemistry: A Foundation
- A book is held 6 feet above the floor and then dropped. Which statement is true? a.The potential energy of the book is converted to kinetic energy. b.The potential energy of the book is destroyed. c.Kinetic energy is created. d.The total energy of the system will not be conserved.arrow_forwardExplain the economic importance of conversions between different forms of energy and the inevitability of losses in this process.arrow_forwardWhich of the following is an endothermic process? combustion of gasoline in a car engine i>sublimation of carbon dioxide: water condensing on a cold pipe freezing juice to make popsiclesarrow_forward
- A 45-g aluminum spoon (specific heat 0.88 J/g C) at 24 C is placed in 180 mL (180 g) of coffee at 85 C and the temperature of the two become equal. (a) What is the final temperature when the two become equal? Assume that coffee has the same specific heat as water. (b) The first time a student solved this problem she got an answer of 88 C. Explain why this is clearly an incorrect answer.arrow_forwardA piece of iron was heated to 95.4C and dropped into a constant-pressure calorimeter containing 284 g of water at 32.2C. The final temperature of the water and iron was 51.9C. Assuming that the calorimeter itself absorbs a negligible amount of heat, what was the mass (in grams) of the piece of iron? The specific heat of iron is 0.449 J/(gC), and the specific heat of water is 4.18 J/(gC).arrow_forwardHydrogen is an ideal fuel in many respects; for example, the product of its combustion, water, is nonpolluting. The heat given off in burning hydrogen to gaseous water is 5.16 104 Btu per pound. What is this heat energy in joules per gram? (1 Btu = 252 cal; see also Table 1.4.)arrow_forward
- The flashlight in the photo does not use batteries. Instead, you move a lever, which turns a geared mechanism and finally results in light from the bulb. What type of energy is used to move the lever? What type or types of energy are produced?arrow_forwardBicycling Describe the energy conversions that occur when a bicyclist coasts down a long grade, then struggles to ascend a steep grade.arrow_forwardOn a cold day, you can warm your hands with a heat pad, a device that uses the oxidation of iron to produce energy as heat. 4 Fe(s) + 3 O2(g) 2 Fe2O3(s) A hand warmer uses the oxidation of iron as a source of thermal energy. What mass of iron is needed to supply the energy required to warm 15 mL of water (d = 1.00 g/mL) from 23 C to 37 C?arrow_forward
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