1.3 and 1.4 Quick Check Assessment

A student mixed two chemicals (system) to allow them to react. The thermometer (surroundings) recorded the temperature before the reaction at 18°C and after the reaction at 25° C. 

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Which of the following is true?

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How did heat flow in this reaction?

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Is this an endothermic or exothermic reaction? Explain your reasoning in 1 sentence or less. Click on Show Work and type in response using the text box (T) button.

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Explain why breaking bonds is considered an endothermic process?

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Which is true?

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Which is true?

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Ice melting is an exothermic process

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Which of the following is true?

How did heat flow in this reaction?

Is this an endothermic or exothermic reaction? Explain your reasoning in 1 sentence or less. Click on Show Work and type in response using the text box (T) button.

Explain why breaking bonds is considered an endothermic process?

Which is true?

Which is true?

Ice melting is an exothermic process

Explain how this graph shows that the two objects reached thermal equilibrium