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Discipline: Chemistry

Question topic: Types of Phenomena

Source: Originais Teachy

Level of difficulty: Medium

(Originais Teachy 2023) - Question Medium of Chemistry



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Imagine you are walking on the beach on a sunny day. Your feet begin to feel hot as you walk on the sand. This is an example of a thermal phenomenon, where heat is transferred from the hot sand to your feet. Based on this, can you explain what is happening at the molecular level that is causing your feet to feel hot?
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João and Maria are helping their mother in the kitchen and in this process they are observing some changes that happen with the food and utensils. João notices that the boiled egg looks different on the inside and outside, and Maria observes that the glass holding cold water becomes wet on the outside after some time. Based on these observations, answer the following: a) Identify which of the two phenomena is physical and which is chemical. b) Explain the reasons why you classified each phenomenon in their respective categories, considering the changes that occur in the properties of the materials involved. c) Give two additional examples, one of a physical phenomenon and one of a chemical phenomenon, and justify your choices.
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Question 4:


What are the physical states of matter and what are their main characteristics?
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