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(b) Is this process endothermic or exothermic?
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Ch.5 - Thermochemistry
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970
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TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement146
- Ch.2 - Atoms, Molecules, and Ions200
- Ch.3 - Chemical Reactions and Reaction Stoichiometry176
- Ch.4 - Reactions in Aqueous Solution155
- Ch.5 - Thermochemistry126
- Ch.6 - Electronic Structure of Atoms131
- Ch.7 - Periodic Properties of the Elements126
- Ch.8 - Basic Concepts of Chemical Bonding123
- Ch.9 - Molecular Geometry and Bonding Theories143
- Ch.10 - Gases147
- Ch.11 - Liquids and Intermolecular Forces91
- Ch.12 - Solids and Modern Materials122
- Ch.13 - Properties of Solutions126
- Ch.14 - Chemical Kinetics174
- Ch.15 - Chemical Equilibrium101
- Ch.16 - Acid-Base Equilibria139
- Ch.17 - Additional Aspects of Aqueous Equilibria146
- Ch.18 - Chemistry of the Environment72
- Ch.19 - Chemical Thermodynamics129
- Ch.20 - Electrochemistry142
- Ch.21 - Nuclear Chemistry101
- Ch.22 - Chemistry of the Nonmetals68
- Ch.23 - Transition Metals and Coordination Chemistry66
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry10
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970Non è quello che usi tu?Cambia libro di testo
Capitolo 5, Problema 54c
Consider the data about gold metal in Exercise 5.24(b). c. What is the molar heat capacity of Au(s)?
Guida verificata passo dopo passo1
Identify the given data from Exercise 5.24(b) related to gold (Au), such as its specific heat capacity and molar mass.
Recall the formula for molar heat capacity: \( C_m = c \times M \), where \( c \) is the specific heat capacity and \( M \) is the molar mass.
Substitute the specific heat capacity of gold into the formula. The specific heat capacity is typically given in units of \( \text{J/g} \cdot \text{°C} \).
Substitute the molar mass of gold into the formula. The molar mass of gold is approximately 197 g/mol.
Multiply the specific heat capacity by the molar mass to find the molar heat capacity of gold in units of \( \text{J/mol} \cdot \text{°C} \).
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Molar Heat Capacity
Molar heat capacity is the amount of heat required to raise the temperature of one mole of a substance by one degree Celsius (or one Kelvin). It is an important property that reflects how a substance absorbs and retains heat, influencing its thermal behavior. For solids like gold, this value can vary based on temperature and phase.
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02:19
Heat Capacity
Specific Heat Capacity
Specific heat capacity is the heat required to raise the temperature of one gram of a substance by one degree Celsius. While molar heat capacity is expressed per mole, specific heat is often used for practical calculations involving smaller quantities. The relationship between the two can be established through the molar mass of the substance.
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02:19Heat Capacity
Thermodynamic Properties of Metals
The thermodynamic properties of metals, including heat capacity, are influenced by their atomic structure and bonding. Metals typically have high thermal conductivity and specific heat capacities, which affect how they respond to heat. Understanding these properties is essential for applications in materials science and engineering, particularly in processes involving temperature changes.
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02:05Metal Properties
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Domanda del libro di testo
When a 5.10-g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee-cup calorimeter (Figure 5.18), the temperature rises from 20.5 to 33.2 °C. b. Using your result from part (a), calculate ΔH (in kJ/mol NaOH) for the solution process. Assume that the specific heat of the solution is the same as that of pure water.
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Domanda del libro di testo
When a 5.10-g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee-cup calorimeter (Figure 5.18), the temperature rises from 20.5 to 33.2 °C. a. Calculate the quantity of heat (in kJ) released in the reaction.
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Domanda del libro di testo
Consider the data about gold metal in Exercise 5.24(b). b. Suppose that the same amount of heat is added to two 10.0-g blocks of metal, both initially at the same temperature. One block is gold metal, and the other is iron metal. Which block will have the greater rise in temperature after addition of the heat?
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Domanda del libro di testo
The specific heat of ethanol, C2H5OH(l), is 2.44 J•g/K. b. Which will require more heat, increasing the temperature of 1 mol of C2H5OH(𝑙) by a certain amount or increasing the temperature of 1 mol of H2O(𝑙) by the same amount?
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Domanda del libro di testo
The specific heat of ethanol, C2H5OH(l), is 2.44 J•g/K. (a) How many J of heat are needed to raise the temperature of 80.0 g of octane from 10.0 to 25.0 °C?
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