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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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 105b
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)?
Guida verificata passo dopo passo1
Step 1: Recall the formula for heat transfer: \( q = m \cdot c \cdot \Delta T \), where \( q \) is the heat absorbed, \( m \) is the mass of the substance, \( c \) is the specific heat capacity, and \( \Delta T \) is the change in temperature.
Step 2: Rearrange the formula to solve for \( c \), the specific heat capacity: \( c = \frac{q}{m \cdot \Delta T} \).
Step 3: Substitute the given values into the formula: \( q = 11 \, \text{J} \), \( m = 4.7 \, \text{g} \), and \( \Delta T = 4.5 \, \degree \text{C} \).
Step 4: Calculate \( c \) using the substituted values. This will give the specific heat capacity of the metal in \( \text{J/g} \cdot \degree \text{C} \).
Step 5: Compare the calculated specific heat capacity to the values provided in Table 3.11 for titanium and aluminum (not shown in the image). Identify the metal based on the closest match.
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Specific Heat Capacity
Specific heat capacity is the amount of heat required to raise the temperature of one gram of a substance by one degree Celsius. It is a crucial property for identifying materials, as different metals have distinct specific heat capacities. In this problem, knowing the specific heat capacity of titanium and aluminum will help determine which metal is present based on the heat absorbed and the temperature change.
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Percorso guidato
02:19
Heat Capacity
Heat Transfer
Heat transfer refers to the movement of thermal energy from one object or substance to another. In this context, the metal absorbs heat, which causes its temperature to rise. The relationship between the heat absorbed, the mass of the metal, and the change in temperature is described by the formula Q = mcΔT, where Q is the heat absorbed, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature.
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02:19Heat Capacity
Identifying Metals
Identifying metals based on their physical properties, such as specific heat capacity, is a common practice in materials science. By comparing the calculated specific heat capacity of the unknown metal with known values for titanium and aluminum, one can determine which metal is present. This process often involves using tables or charts that list the specific heat capacities of various metals for quick reference.
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01:08Periodic Trend: Metallic Character
Pratica correlata
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?
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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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Domanda del libro di testo
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?
1007
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