Multiple Choice
Which type of energy change occurs when gasoline evaporates from a fuel gas can?
59
views
8. Thermochemistry
Endothermic & Exothermic Reactions
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following best describes what happens during an exothermic reaction?
A
It absorbs energy from the surroundings.
B
It requires a continuous input of energy to proceed.
C
It releases energy to the surroundings, usually in the form of heat.
D
It decreases the temperature of the surroundings.
Verified step by step guidance1
Understand the definition of an exothermic reaction: it is a chemical reaction that releases energy to its surroundings.
Recall that energy released in exothermic reactions is often in the form of heat, causing the surroundings to become warmer.
Recognize that because energy is released, the system loses energy, which means it does not require continuous input of energy to proceed.
Note that since energy is given off, the surroundings gain energy, so the temperature of the surroundings typically increases rather than decreases.
Conclude that the best description of an exothermic reaction is that it releases energy to the surroundings, usually as heat.
2:30mWatch next
Master Endothermic & Exothermic Reactions with a bite sized video explanation from Jules
Start learningRelated Videos
Related Practice
Endothermic & Exothermic Reactions practice set
Problem sets built by lead tutorsExpert video explanations