
Concept explainers
Interpretation: The reason for endothermic reactions to takes place in all the given options needs to be determined.
Concept introduction: An exothermic process is a process where energy flows out of the given system into the surrounding.Endothermic process is a process in which energy flows from the surroundings into the system

Answer to Problem 9STP
B is the correct option.
Explanation of Solution
Endothermic process is a process in which energy flows from the surroundings into the system. For example, Water boils to form steam.
For an endothermic reaction to take place there must be a predominant driving force of matter spread. This spread of matter will overcome an energy change taking place in the opposite direction.
For an endothermic reaction to take place, a driving force of matter spread needs to be predominant. So, options A, C and D are incorrect.
Chapter 10 Solutions
World of Chemistry
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