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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 93
5장, 문제 93

The heat of combustion of fructose, C6H12O6, is -2812 kJ/mol. If a fresh golden delicious apple weighing 120 g contains 16.0 g of fructose, what caloric content does the fructose contribute to the apple?

검증된 단계별 안내
1
Determine the molar mass of fructose (C_6H_{12}O_6) by adding the atomic masses of its constituent elements: C, H, and O.
Calculate the number of moles of fructose in 16.0 g using the formula: \( \text{moles} = \frac{\text{mass}}{\text{molar mass}} \).
Use the heat of combustion value (-2812 kJ/mol) to find the total energy released by the combustion of the calculated moles of fructose.
Convert the energy from kilojoules to calories using the conversion factor: 1 kJ = 239.006 calories.
The result from the previous step gives the caloric content contributed by the fructose in the apple.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Heat of Combustion

The heat of combustion is the amount of energy released when a substance is completely burned in oxygen. It is typically expressed in kilojoules per mole (kJ/mol). For fructose, the heat of combustion is -2812 kJ/mol, indicating that this amount of energy is released when one mole of fructose is combusted.
추천 영상:
가이드 코스
02:24
Combustion Apparatus

Molar Mass

Molar mass is the mass of one mole of a substance, usually expressed in grams per mole (g/mol). For fructose (C6H12O6), the molar mass is approximately 180.18 g/mol. This value is essential for converting between grams of fructose and moles, which is necessary for calculating the energy contribution from the fructose in the apple.
추천 영상:
가이드 코스
02:11
Molar Mass Concept

Caloric Content Calculation

Caloric content calculation involves determining the energy provided by a specific mass of a substance based on its heat of combustion. To find the caloric content contributed by fructose in the apple, one must first convert the mass of fructose to moles and then multiply by the heat of combustion to find the total energy released, which can be expressed in kilojoules or converted to calories.
추천 영상:
가이드 코스
02:28
Stoichiometric Rate Calculations
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