Question

determine whether each of the following is exothermic or endothermic. drag the appropriate processes to their respective bins. gas burning in a car water evaporating from a glass overnight water condensing on a bathroom mirror after a hot shower endothermic exothermic you sorted 2 out of 3 items incorrectly. when water evaporates, it absorbs heat from the surroundings (hence, it cools you off when it evaporates from your skin). recall that, in exothermic processes, energy is released whereas, in endothermic processes, energy is absorbed. no credit lost. try again.

Explanation:

• Gas burning in a car: Combustion reactions release energy (heat and light), so it is exothermic.
• Water evaporating from a glass overnight: Evaporation requires energy absorption (to break the intermolecular forces in liquid water and convert it to gas), so it is endothermic.
• Water condensing on a bathroom mirror after a hot shower: Condensation is the reverse of evaporation. Gas - phase water releases energy to form liquid water (as intermolecular forces are formed), so it is exothermic.

Answer:

• Endothermic: Water evaporating from a glass overnight
• Exothermic: Gas burning in a car, Water condensing on a bathroom mirror after a hot shower