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Which of the following is consistent with a spontaneous endothermic reaction
Stimulant
A substance that raises levels of physiological or nervous activity in the body, often used therapeutically to increase alertness or physical performance.
Depressant
A substance that reduces the functioning of the nervous system, often used to decrease anxiety and induce sleep.
Narcotic
A class of substances that relieve pain and induce a state of sleep or stupor; often associated with opioids, which can be both legal medications and illicit drugs.
Barbiturates
A class of drugs that are used as sedatives and hypnotics, which can depress the central nervous system.
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