Temperature Changes in Chemical Reactions

The video tutorial covers various experiments to explore reaction energy, focusing on endothermic and exothermic reactions. It includes experiments with salt substitute, Epsom salt, hydrogen peroxide with yeast, and vinegar with baking soda, observing temperature changes to determine reaction types.

What was the initial temperature of the water before adding the salt substitute?

• 53 degrees Fahrenheit

• 40 degrees Celsius

• 66 degrees Fahrenheit

• 63 degrees Fahrenheit

What was the main observation when Epsom salt was added to water?

• The temperature increased significantly

• The Epsom salt dissolved quickly

• The temperature decreased slightly

• There was no noticeable temperature change

What was the initial temperature of the hydrogen peroxide before adding dry yeast?

• 60 degrees Fahrenheit

• 65 degrees Fahrenheit

• 68 degrees Fahrenheit

• 70 degrees Fahrenheit

What was the result of adding dry yeast to hydrogen peroxide?

• The mixture remained unchanged

• The mixture bubbled and the temperature rose

• The mixture turned purple

• The mixture cooled down

What was the initial temperature of the vinegar before adding baking soda?

• 70 degrees Fahrenheit

• 60 degrees Fahrenheit

• 68 degrees Fahrenheit

• 65 degrees Fahrenheit

What was the main observation when baking soda was added to vinegar?

• The mixture turned blue

• The mixture remained unchanged

• The temperature increased

• The temperature decreased

What was the final temperature change observed in the baking soda and vinegar experiment?

• The temperature increased by 8 degrees

• The temperature decreased by 8 degrees

• The temperature remained the same

• The temperature increased by 5 degrees

What was the expected temperature change in the steel wool experiment?

• A decrease of 5 degrees Fahrenheit

• An increase of 5 degrees Fahrenheit

• No change in temperature

• An increase of 10 degrees Fahrenheit

What was the purpose of placing steel wool against the thermometer?

• To check if the thermometer is working

• To see if the steel wool changes color

• To observe an increase in temperature

• To observe a decrease in temperature

What type of reaction is indicated by a rise in temperature?

• Exothermic

• Catalytic

• Neutral

• Endothermic