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Ch.5 - Thermochemistry
Brown - Chemistry: The Central Science 14th Edition
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Brown 14th EditionCh.5 - Thermochemistry문제 54c
5장, 문제 54c

Consider the data about gold metal in Exercise 5.26(b). (c) What is the molar heat capacity of Au(s)?

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Identify the specific heat capacity of gold (Au) from the data provided in Exercise 5.26(b).
Recall the formula for molar heat capacity, which is given by: \( C_m = C_s \times M \), where \( C_s \) is the specific heat capacity and \( M \) is the molar mass.
Look up the molar mass of gold (Au), which is typically found on the periodic table.
Substitute the values of \( C_s \) and \( M \) into the formula to calculate the molar heat capacity of gold.
Ensure the units are consistent and convert if necessary, typically the molar heat capacity is expressed in units of J/(mol\(\cdot\) K).

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주요 개념

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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, this value can vary based on the material's structure and bonding.
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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 in chemistry. The relationship between the two can be established by multiplying the specific heat capacity by the molar mass of the substance.
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Heat 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 predicting how metals behave under varying temperature conditions, such as in reactions or phase changes.
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Metal Properties
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교과서 질문

When a 6.50-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 21.6 to 37.8 °C (b) Using your result from part (a), calculate H (in kJ/mol KOH) for the solution process. Assume that the specific heat of the solution is the same as that of pure water.

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교과서 질문

The specific heat of octane, C8H18(l), is 2.22 J•g/K. (b) Which will require more heat, increasing the temperature of 1 mol of C8H18(l), by a certain amount or increasing the temperature of 1 mol of H2O(l) by the same amount?

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교과서 질문

(b) Is this process endothermic or exothermic?

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교과서 질문

Consider the data about gold metal in Exercise 5.26(b). (a) Based on the data, calculate the specific heat of Au(s).

교과서 질문

Consider the data about gold metal in Exercise 5.26(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 one is iron metal. Which block will have the greater rise in temperature after the addition of the heat?

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교과서 질문

When a 6.50-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 21.6 to 37.8 °C (a) Calculate the quantity of heat (in kJ) released in the reaction.

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