Domanda del libro di testo
Convert between energy units. c. 4.99 × 103 kJ to kWh
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Ch.6 - Thermochemistry
Tro4th EditionChemistry: A Molecular ApproachISBN: 9780134112831
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TOC.tableOfContents
- Ch.1 - Matter, Measurement & Problem Solving136
- Ch.2 - Atoms & Elements112
- Ch.3 - Molecules, Compounds & Chemical Equations159
- Ch.4 - Chemical Quantities & Aqueous Reactions140
- Ch.5 - Gases118
- Ch.6 - Thermochemistry106
- Ch.7 - Quantum-Mechanical Model of the Atom62
- Ch.8 - Periodic Properties of the Elements103
- Ch.9 - Chemical Bonding I: The Lewis Model104
- Ch.10 - Chemical Bonding II: Molecular Shapes & Valence Bond Theory89
- Ch.11 - Liquids, Solids & Intermolecular Forces73
- Ch.12 - Solids and Modern Material59
- Ch.13 - Solutions110
- Ch.14 - Chemical Kinetics140
- Ch.15 - Chemical Equilibrium78
- Ch.16 - Acids and Bases155
- Ch.17 - Aqueous Ionic Equilibrium176
- Ch.18 - Free Energy and Thermodynamics108
- Ch.19 - Electrochemistry118
- Ch.20 - Radioactivity and Nuclear Chemistry82
- Ch.21 - Organic Chemistry150
Tro4th EditionChemistry: A Molecular ApproachISBN: 9780134112831Non è quello che usi tu?Cambia libro di testo
Capitolo 6, Problema 36a,b
A particular frost-free refrigerator uses about 745 kWh of electrical energy per year. Express this amount of energy in each unit. a. J b. kJ
Guida verificata passo dopo passo1
Step 1: Understand the relationship between kilowatt-hours (kWh) and joules (J). 1 kWh is equivalent to 3.6 million joules (3.6 x 10^6 J).
Step 2: To convert the energy usage from kWh to joules, multiply the given energy in kWh by the conversion factor (3.6 x 10^6 J/kWh).
Step 3: Calculate the energy in joules using the formula: Energy (J) = Energy (kWh) x 3.6 x 10^6 J/kWh.
Step 4: To convert joules to kilojoules (kJ), use the conversion factor where 1 kJ = 1000 J.
Step 5: Calculate the energy in kilojoules by dividing the energy in joules by 1000.
Concetti chiave
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Energy Units
Energy can be measured in various units, with the most common being joules (J) and kilowatt-hours (kWh). One kilowatt-hour is defined as the energy consumed by a power of one kilowatt running for one hour, which is equivalent to 3.6 million joules (3.6 x 10^6 J). Understanding these units is essential for converting energy values.
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Percorso guidato
02:13
SI Units
Conversion Factors
To convert between different units of energy, specific conversion factors are used. For instance, to convert kWh to joules, you multiply the number of kWh by 3.6 x 10^6. Similarly, to convert joules to kilojoules (kJ), you divide the number of joules by 1,000, since 1 kJ equals 1,000 J. Mastery of these conversion factors is crucial for accurate calculations.
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Percorso guidato
01:56Conversion Factors
Practical Applications of Energy Measurement
Understanding energy consumption in practical terms, such as in household appliances, helps in evaluating efficiency and cost. For example, knowing how much energy a refrigerator uses in kWh allows consumers to estimate their electricity bills and make informed decisions about energy-efficient appliances. This concept ties together the theoretical understanding of energy with real-world implications.
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Percorso guidato
02:52Units of Radiation Measurement
Pratica correlata
Domanda del libro di testo
Suppose that a person eats 2387 Calories per day. Convert this amount of energy into each unit. a. J b. kJ c. kWh
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Domanda del libro di testo
A particular frost-free refrigerator uses about 745 kWh of electrical energy per year. Express this amount of energy in each unit. c. Cal
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Domanda del libro di testo
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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