Chemistry > A-Level Question Paper > collision theory gizmoDONE. (All)

collision theory gizmoDONE.

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Question: How does temperature affect the rate of a chemical reaction? 1. Observe: Select the ANIMATION tab. View the animation with No catalyst selected. What do you see? the higher the temperature... , the faster the chemical reaction. When two reactant molecules meet, they form a temporary structure called an activated complex. The activated complex breaks up into the product molecules. 2. Observe: Return to the CONTROLS pane. Set the Temperature to 0 °C and the Simulation speed to its maximum setting. Click Play. A. Describe the motions of the molecules. They slow down. B. Now set the Temperature to 200 °C. How does increasing the temperature affect the motions of the molecules? They speed up. C. What do you notice about the chemical reaction at the higher temperature? The chemical reactions become faster. 3. Interpret: Select the GRAPH tab. Click the zoom out button ( ) until you can see the whole graph. What does this graph show? The reactants go down and the products go up. 4. Predict: How do you think temperature will affect the rate of a chemical reaction? The reaction will happen in a shorter amount of time if the temperature is up. (Activity A continued on next page) [Show More]

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