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Exercício de Quantidade energética
Exercício:
Pessoal, não estaria a alternativa C correta também? Visto que o resultado é aproximadamente 328 J, assim como na D o valor não era exato da mesma forma.
03. A energia utilizada para a manutenção e o desempenho do corpo humano é obtida por meio dos alimentos que são ingeridos. A tabela a seguir mostra a quantidade média de energia absorvida pelo corpo humano a cada 100 gramas do alimento ingerido.
Se for preciso, use: 1 caloria = 4,2 joules; calor específico sensível da água = 1,0 cal/g. °C.
Analisando a tabela, podemos concluir que, em termos energéticos:
A) o chocolate é o alimento mais energético dentre os listados;
B) uma fatia de mamão equivale, aproximadamente, a 10 folhas de alface;
C) um copo de Coca-cola fornece uma energia de, aproximadamente, 328 J;
D) 0,50 kg de sorvete é equivalente a, aproximadamente, 320 g de batatas fritas;
E) um sanduíche com 2 fatias de pão, 2 folhas de alface e 2 folhas de repolho equivale a 1 unidade de batata frita.
a) Falso — O alimento mais energético é a margarina vegetal.
b) Falso — 1 fatia de mamão → 32 kcal.
10 folhas de alface → 7,5 kcal.
c) Falso — 1 copo de Coca-Cola → 2 · 39 kcal = 78 kcal = 327,6 kJ.
d) Verdadeiro — 0,5 kg de sorvete → 5 · 175 kcal = 875 kcal.
320 g de batatas fritas → 3,2 · 274 kcal = 876,8 kcal.
e) Falso — 1 sanduíche → (269 + 15/10 + 28/5) kcal = 276,1 kcal.
1 unidade de batatas fritas → 274/2 kcal = 137 kcal.
Acredito que a C esteja errada pq o resultado é 327,6 kJ (ou 327600 J) e no enunciado está falando 328 J.
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