Domanda del libro di testo
A metal is thought to be titanium or aluminum. When 4.7 g of the metal absorbs 11 J, its temperature rises by 4.5 °C.
b. Would you identify the metal as titanium or aluminum (see TABLE 3.11)?
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Ch.3 Matter and Energy
Timberlake14th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9781292472249
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TOC.tableOfContents
- Ch.1 Chemistry in Our Lives19
- Ch.2 Chemistry and Measurements80
- Ch.3 Matter and Energy53
- Ch.4 Atoms and Elements58
- Ch.5 Nuclear Chemistry42
- Ch.6 Ionic and Molecular Compounds57
- Ch.7 Chemical Quantities and Reactions38
- Ch.8 Gases30
- Ch.9 Solutions50
- Ch.10 Acids and Bases and Equilibrium64
- Ch.11 Introduction to Organic Chemistry: Hydrocarbons77
- Ch.12 Alcohols, Thiols, Ethers, Aldehydes, and Ketones82
- Ch.13 Carbohydrates54
- Ch.14 Carboxylic Acids, Esters, Amines, and Amides91
- Ch.15 Lipids61
- Ch.16 Amino Acids, Proteins, and Enzymes84
- Ch.17 Nucleic Acids and Protein Synthesis86
- Ch.18 Metabolic Pathways and ATP Production73
Timberlake14th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9781292472249Non è quello che usi tu?Cambia libro di testo
Capitolo 3, Problema 102b
When 1.0 g of gasoline burns, it releases 11 kcal. The density of gasoline is 0.74 g/mL.
b. If a television requires 150 kJ/h to run, how many hours can the television run on the energy provided by 1.0 gal of gasoline?
Guida verificata passo dopo passo1
Convert the volume of gasoline from gallons to milliliters. Use the conversion factor: 1 gallon = 3785 mL.
Calculate the mass of gasoline in grams using the density formula: \( \text{Density} = \frac{\text{Mass}}{\text{Volume}} \). Rearrange to find \( \text{Mass} = \text{Density} \times \text{Volume} \). Substitute the density of gasoline (0.74 g/mL) and the volume in mL.
Determine the total energy released by burning the calculated mass of gasoline. Use the given energy release rate: 1.0 g of gasoline releases 11 kcal. Multiply the mass of gasoline by 11 kcal/g to find the total energy in kcal.
Convert the total energy from kcal to kJ. Use the conversion factor: 1 kcal = 4.184 kJ.
Calculate the number of hours the television can run. Divide the total energy in kJ by the energy consumption rate of the television (150 kJ/h).
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Energy Conversion
Energy conversion refers to the process of changing energy from one form to another. In this context, the energy released from burning gasoline (measured in kilocalories) must be converted to kilojoules, as the television's energy requirement is given in kJ. Understanding this conversion is essential for calculating how long the television can run on the energy provided by gasoline.
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Percorso guidato
03:45
Conversion Factors (Simplified) Example 2
Density and Volume Calculations
Density is the mass per unit volume of a substance, and it is crucial for determining how much gasoline is available in a given volume. Given the density of gasoline (0.74 g/mL), one can calculate the total mass of gasoline in 1.0 gallon (which is approximately 3785 mL). This mass is necessary to find the total energy available from the gasoline for the television.
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Percorso guidato
01:56Density
Power Consumption
Power consumption refers to the rate at which energy is used, typically measured in watts or kilojoules per hour. In this scenario, the television's requirement of 150 kJ/h indicates how much energy it consumes over time. By comparing the total energy available from the gasoline to the power consumption of the television, one can determine the duration for which the television can operate.
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Percorso guidato
04:42Powers and Root Functions
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A 45-g piece of ice at 0.0 °C is added to a sample of water at 8.0 °C. All of the ice melts and the temperature of the water decreases to 0.0 °C. How many grams of water were in the sample?
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Domanda del libro di testo
In a large building, oil is used in a steam boiler heating system. The combustion of 1.0 lb of oil provides 2.4 × 107 J.
b. How many kilograms of oil are needed to change 150 kg of water to steam at 100 °C?
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Domanda del libro di testo
A metal is thought to be copper or gold. When 18 g of the metal absorbs 58 cal, its temperature rises by 35 °C.
a. What is the specific heat, in cal/g °C, of the metal?
2331
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Domanda del libro di testo
In a large building, oil is used in a steam boiler heating system. The combustion of 1.0 lb of oil provides 2.4 × 107 J.
a. How many kilograms of oil are needed to heat 150 kg of water from 22 °C to 100 °C?
935
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