GRE Subject Test: Chemistry : Endothermic and Exothermic Reactions

Study concepts, example questions & explanations for GRE Subject Test: Chemistry

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Example Questions

Example Question #14 : Thermodynamics And Phases

When the enthalpy of a reaction has a value of , which word is used to describe the reaction? 

Possible Answers:





Correct answer:



When the enthalpy of a reaction is negative, it means that heat has been released from the system to the surroundings. This release of energy is referred to as an exothermic reaction.

Endothermic reactions have a net heat flow into the system. Exergonic and endergonic are terms used to describe the change in free energy for a given system.

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