endo and exo
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What is an endothermic reaction?
A reaction that absorbs energy from its surroundings, usually in the form of heat.
What is an exothermic reaction?
A reaction that releases energy to its surroundings, typically in the form of heat.
True or False: In an exothermic reaction, the products have a higher energy than the reactants.
False
Fill in the blank: In an endothermic reaction, the energy of the products is _____ than the energy of the reactants.
higher
Which of the following is an example of an exothermic reaction? A) Photosynthesis B) Combustion C) Melting ice
B) Combustion
What is the general formula for calculating the energy change in a chemical reaction?
Energy change = Energy of products - Energy of reactants
True or False: Endothermic reactions feel cold to the touch.
True
What type of reaction occurs when ammonium nitrate dissolves in water?
Endothermic reaction
In an exothermic reaction, what happens to the temperature of the surroundings?
The temperature increases.
What type of reaction is photosynthesis?
Endothermic reaction
Multiple Choice: Which reaction is an example of an endothermic process? A) Respiration B) Freezing water C) Cooking an egg
C) Cooking an egg
What is the energy source for endothermic reactions?
Heat energy from the surroundings.
True or False: The energy change in an exothermic reaction is negative.
True
Fill in the blank: In an exothermic reaction, the energy of the products is _____ than the energy of the reactants.
lower
What occurs during a chemical reaction that causes energy to be absorbed or released?
The breaking and forming of chemical bonds.
Give 2 examples of an endothermic reaction.
photosynthesis and a chemical ice pack
Give 2 examples of an exothermic reaction.
Combustion and a nuclear bomb.