Multiple Choice
Which of the following processes is an endothermic process?
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8. Thermochemistry
Endothermic & Exothermic Reactions
Multiple Choice
In thermochemistry, what can be concluded about a reaction with a negative enthalpy change ?
A
The reaction is exothermic and releases heat to the surroundings.
B
The reaction is endothermic and absorbs heat from the surroundings.
C
The reaction has no heat exchange because .
D
The reaction is spontaneous at all temperatures because .
Verified step by step guidance1
Understand that the enthalpy change, denoted as \(\Delta\!H\), represents the heat absorbed or released by a system during a reaction at constant pressure.
Recognize that a negative enthalpy change (\(\Delta\!H < 0\)) means the system loses heat to the surroundings.
Recall that when heat is released to the surroundings, the reaction is classified as exothermic.
Contrast this with an endothermic reaction, where \(\Delta\!H > 0\), meaning heat is absorbed from the surroundings.
Conclude that a reaction with \(\Delta\!H < 0\) is exothermic and releases heat to the surroundings.
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