Domanda del libro di testo
Convert between energy units. c. 4.99 × 103 kJ to kWh
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Ch.7 - Thermochemistry
Tro6th EditionChemistry: A Molecular ApproachISBN: 9780137832217
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TOC.tableOfContents
- Ch.1 - Matter, Measurement & Problem Solving118
- Ch.2 - Atoms & Elements106
- Ch.3 - Molecules and Compounds131
- Ch.4 - Chemical Reactions and Chemical Quantities56
- Ch.5 - Introduction to Solutions and Aqueous Solutions82
- Ch.6 - Gases114
- Ch.7 - Thermochemistry96
- Ch.8 - The Quantum-Mechanical Model of the Atom60
- Ch.9 - Periodic Properties of the Elements90
- Ch.10 - Chemical Bonding I: The Lewis Model89
- Ch.11 - Chemical Bonding II: Molecular Shapes, VSEPR & MO Theory85
- Ch.12 - Liquids, Solids & Intermolecular Forces51
- Ch.13 - Solids & Modern Materials47
- Ch.14 - Solutions90
- Ch.15 - Chemical Kinetics115
- Ch.16 - Chemical Equilibrium68
- Ch.17 - Acids and Bases136
- Ch.18 - Aqueous Ionic Equilibrium153
- Ch.19 - Free Energy & Thermodynamics93
- Ch.20 - Electrochemistry106
- Ch.21 - Radioactivity & Nuclear Chemistry74
- Ch.22 - Organic Chemistry140
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Capitolo 7, Problema 35c
Suppose that a person eats 2105 Calories per day. Convert this amount of energy into each unit. c. kWh
Guida verificata passo dopo passo1
Understand that 1 Calorie (with an uppercase C, also known as a kilocalorie) is equivalent to 1000 calories (with a lowercase c).
Recall that 1 calorie is equivalent to 4.184 joules.
Calculate the total energy in joules by multiplying the number of Calories by 1000 to convert to calories, and then by 4.184 to convert to joules.
Remember that 1 kilowatt-hour (kWh) is equivalent to 3.6 million joules (3.6 x 10^6 J).
Convert the energy from joules to kilowatt-hours by dividing the total joules by 3.6 million.
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Calorie Conversion
A Calorie (specifically a kilocalorie) is a unit of energy commonly used in nutrition. It is defined as the amount of energy required to raise the temperature of one kilogram of water by one degree Celsius. Understanding how to convert Calories to other energy units is essential for solving energy-related problems.
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Percorso guidato
01:56
Conversion Factors
Energy Units
Energy can be measured in various units, including joules, kilowatt-hours (kWh), and Calories. One kilowatt-hour is the amount of energy consumed by a 1,000-watt appliance running for one hour, equivalent to 3.6 million joules. Familiarity with these units and their conversions is crucial for accurate energy calculations.
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Percorso guidato
02:13SI Units
Conversion Factors
Conversion factors are numerical values used to convert one unit of measurement to another. For example, to convert Calories to kWh, one must know that 1 Calorie is approximately 0.000293 kWh. Mastery of these factors allows for seamless transitions between different energy units in calculations.
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01:56Conversion Factors
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Identify each energy exchange as primarily heat or work and determine whether the sign of ΔE is positive or negative for the system. a. Sweat evaporates from skin, cooling the skin. (The evaporating sweat is the system.)
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Which statement is true of the internal energy of a system and its surroundings during an energy exchange with a negative ΔEsys? a. The internal energy of the system increases and the internal energy of the surroundings decreases. b. The internal energy of both the system and the surroundings increases. c. The internal energy of both the system and the surroundings decreases. d. The internal energy of the system decreases and the internal energy of the surroundings increases.
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