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 106a
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?
Guida verificata passo dopo passo1
Step 1: Recall the formula for specific heat capacity: , where is the heat absorbed (in calories), is the mass of the substance (in grams), is the specific heat capacity (in cal/g °C), and is the change in temperature (in °C).
Step 2: Rearrange the formula to solve for the specific heat capacity : .
Step 3: Identify the given values from the problem: cal, g, and °C.
Step 4: Substitute the given values into the rearranged formula: .
Step 5: Simplify the expression to calculate the specific heat capacity . Ensure the units are consistent and the result is expressed in cal/g °C.
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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 material-specific property that indicates how much energy a substance can store. The formula to calculate specific heat is given by Q = mcΔT, where Q is the heat absorbed, m is the mass, c is the specific heat, and ΔT is the change in temperature.
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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 due to a temperature difference. In this context, the metal absorbs heat, which causes its temperature to rise. Understanding how heat is transferred is crucial for calculating specific heat, as it directly relates to the energy absorbed by the substance.
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Percorso guidato
02:19Heat Capacity
Units of Measurement
In this problem, specific heat is measured in calories per gram per degree Celsius (cal/g °C). It is important to be familiar with these units to correctly interpret the results and perform calculations. The mass of the metal is given in grams, and the heat absorbed is in calories, which aligns with the units used for specific heat, ensuring consistency in the calculations.
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02:52Measuring Radioactivity Concept 1
Pratica correlata
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
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?
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