Question

Which of the following processes are endothermic and which are exothermic? Formation of dew Melting of...

Which of the following processes are endothermic and which are exothermic?
Formation of dew
Melting of ice cream
Sublimation of ice
Hardeneing of hot paraffin wax
Attraction of two charged particles
Breaking the bond in an oxygen molecule

Science   Chemistry   
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Answer #1

Formation of dew = Exothermic reaction, since the warm air present in the atmosphere will release the energy to form into semisolid texture present on the grass

Melting ice-cream = Endothermic, since the ice requires heat from the surrounding in order to reduce its temperature and convert into liquid state

Sublimation of ice - Enothermic, since the state change happens from solid to gas

Hardening of hot parraffin wax = state change from liquid to solid, hence exothermic

Attraction of two charged particles - Since it is attraction, then the bond will form so the bond formation is exothermic since excess heat will be given off

Breaking the bond in oxygen molecule - Breaking the bond will required energy, it will be endothermic

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