Formative Retake: Energy in Chemical Reactions

You will watch a short video about a chemical reaction. It is your job to complete your report as the demo is carried out in the video. Use your knowledge of chemical reactions, molecules, atoms, and thermal energy to answer the following questions. Feel free to pause the video as needed and watch again if necessary.

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Write down three observations about copper sulfate.

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Write down three observations about iron.

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As the narrator on the video measures the temperature, record it here. Select "Edit Background" and choose the "T" button on the left to type your answers into the data table.

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What evidence can be observed that a chemical reaction has occured? Select ALL that apply (3).

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What type of a chemical reaction is this?

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How do you know it's that type of a chemical reaction?

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Using Arrows, show what is happening to the energy in this reaction (where it came from and where it's going).

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The word energy should be placed in which part of this chemical equation?

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During chemical reactions the bonds between atoms break and new bonds form. Energy must be absorbed to break a bond, so breaking bonds is endothermic. Making new bonds is exothermic because energy is released.

Looking at the image below, what kind of reaction is occurring and how do you know?

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Which of the following statement describes an exothermic reaction but NOT an endothermic reaction?

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Write down three observations about copper sulfate..

Write down three observations about iron..

As the narrator on the video measures the temperature, record it here. Select "Edit Background" and choose the "T" button on the left to type your answers into the data table.

What evidence can be observed that a chemical reaction has occured? Select ALL that apply (3).

What type of a chemical reaction is this?

How do you know it's that type of a chemical reaction?

Using Arrows, show what is happening to the energy in this reaction (where it came from and where it's going).

The word energy should be placed in which part of this chemical equation?

During chemical reactions the bonds between atoms break and new bonds form. Energy must be absorbed to break a bond, so breaking bonds is endothermic. Making new bonds is exothermic because energy is released.Looking at the image below, what kind of reaction is occurring and how do you know?

Which of the following statement describes an exothermic reaction but NOT an endothermic reaction?

Write down three observations about copper sulfate.

.

Write down three observations about iron.

.

During chemical reactions the bonds between atoms break and new bonds form. Energy must be absorbed to break a bond, so breaking bonds is endothermic. Making new bonds is exothermic because energy is released.

Looking at the image below, what kind of reaction is occurring and how do you know?