Alaska Hairdresser and Barber Certification Practice Exam 2024 - Free Hairdresser and Barber Certification Practice Questions and Study Guide.

An exothermic reaction is a chemical reaction that releases energy in the form of heat. This means that it is self-heating and does not require an added heat source to take place. Option A is incorrect because it is the opposite of what an exothermic reaction does. Option B is incorrect because exothermic reactions do not cool themselves, they heat up. Option D is incorrect because exothermic reactions actually release heat energy, not process faster without heat.