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Yes, an endothermic process requires heat.
causes heat energy to flow from the liquid and cool the surroundings.
Reactions that require energy in the form of heat are called endothermic.
Combustion.
endothermic reaction a positive enthalpy.
Yes, an endothermic process requires heat.
a process or reaction in which the system absorbs energy from the surroundings in the form of heat.
An endothermic change is a process that removes heat energy from its surroundings.
Both condensation from gas to liquid, and freezing from liquid to solid, do.
From the surroundings. From Wikipedia: "...a process or reaction in which the system absorbs energy from its surroundings in the form of (usually, but not always) heat."
causes heat energy to flow from the liquid and cool the surroundings.
Heat transfer from the contents of the bottle to the surroundings.
Reactions that require energy in the form of heat are called endothermic.
During the process of evaporation, heat is absorbed in the surroundings, therefore, cooling it. In this cases, when sweat is evaporated, heat is absorbed in the surroundings and it is cooled, therefore, keeping you cool.
due to adiabatic process no exchange of heat with surroundings instantly.
Combustion.
endothermic reaction a positive enthalpy.