Multiple Choice
In which type of chemical reaction is heat absorbed from the surroundings?
55
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 defines an exothermic reaction?
A
A reaction that absorbs heat from its surroundings
B
A reaction that occurs only at high temperatures
C
A reaction in which the products have higher enthalpy than the reactants
D
A reaction that releases heat to its surroundings
Verified step by step guidance1
Understand the concept of enthalpy (\( \Delta H \)) in chemical reactions, which represents the heat content of a system.
Recall that an exothermic reaction is one where heat is released to the surroundings, meaning the system loses heat.
Recognize that when heat is released, the enthalpy of the products is lower than that of the reactants, so \( \Delta H < 0 \).
Contrast this with an endothermic reaction, where heat is absorbed from the surroundings and \( \Delta H > 0 \).
Therefore, the best definition of an exothermic reaction is one that releases heat to its surroundings.
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