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level: Energy changes

Questions and Answers List

level questions: Energy changes

Question	Answer
Describe the change occurring as a substance freezes.	energy is removed
Describe the change occurring as a substance condenses.	energy is removed
Describe the change occurring as a substance melts.	energy is added
Describe the change occurring as a substance evaporates.	energy is added
Does changing state from a liquid to a gas release or absorb energy?	absorb
Does changing state from a solid to a liquid release or absorb energy?	absorb
Does changing state from a liquid to a solid release or absorb energy?	release
Does changing state from a gas to a liquid release or absorb energy?	releases energy
A substance changing from a gas to a liquid is an example of what kind of a reaction?	exothermic
A substance changing from a liquid to a solid is an example of what kind of a reaction?	exothermic
A substance changing from a liquid to a gas is an example of what kind of a reaction?	endothermic
A substance changing from a solid to a liquid is an example of what kind of a reaction?	endothermic
Which examples illustrate an endothermic reaction?	Chocolate melting in the sun
Which example illustrates an exothermic reaction?	Water freezing
Is there an increase or a decrease in the temperature of a substance after an exothermic reaction?	increase
Is there an increase or a decrease in the temperature of a substance after an endothermic reaction?	decrease
Does the following graphic illustrate a release or absorption of energy?	absorption
What type of reaction does the following graphic illustrate?	endothermic
What type of reaction does the following graphic illustrate?	exothermic