
Chemical Reactions and Heat Exchange
Authored by Jhoseph Alves
Other
3rd Grade
Used 1+ times

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28 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Qual é o termo usado para descrever uma reação que absorve calor do ambiente?
Exotérmica
Endotérmica
Neutra
Combustão
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Qual das seguintes reações libera calor?
Derretimento do gelo
Fervura da água
Queima de madeira
Fotossíntese
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Em uma reação química, se a entalpia dos produtos for menor que a entalpia dos reagentes, que tipo de reação é?
Endotérmica
Exotérmica
Neutra
Reversível
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Qual das seguintes é um exemplo de mudança física?
Ferrugem no ferro
Derretimento do gelo
Queima de papel
Assar um bolo
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
O que acontece com a temperatura do ambiente durante uma reação exotérmica?
Ela aumenta
Ela diminui
Ela permanece a mesma
Ela oscila
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Qual das seguintes é um exemplo de um processo endotérmico?
Congelamento de água
Condensação de vapor
Fotossíntese
Combustão de gasolina
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Qual é a variação de entalpia (ΔH) para uma reação exotérmica?
Positiva
Negativa
Zero
Indefinida
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