Classify each process as exothermic or endothermic.
(a) gasoline burning in a car
(b) isopropyl alcohol evaporating from skin
(c) water condensing as dew during the night
Solution 63P :
Here, we have to classify each process if its exothermic or endothermic. First let’s see what is an endothermic and exothermic process.
An endothermic process is a process or reaction in which the system absorbs energy from its surroundings usually in the form of heat.
An exothermic process is a process or reaction that releases energy from the system to its surroundings, usually in the form of heat, light (ex: a spark, flame, or flash), electricity (ex : a battery), or sound (ex: explosion heard when burning hydrogen).
Step 2 :
(a) gasoline burning in a car :
Gasoline burning in a car is a reaction in which the energy from the system is released as heat energy and hence is an exothermic process.