sessionmasteringchemistrycom m 60Chapter 3 K36 of 46 cise 36

session.masteringchemistry.com m 60-Chapter 3 K36 of 46 cise 3.63 - Enhanced-with Feedback rmine whether each of the following is exothermic or endothermic g the appropriate processes to their respective bins. Gas burning in a car Water condensing as dew during the Isopropyl alcohol evaporating from skin Exothermic Endothermic 1 pt 39. Exercise 3.18 80 F6 FI F2 F3 F4 F5 F7 F8

Solution

Exothermic reaction are those which releases/evolve heat into the surrounding ie

Reactants - - - - - > product + heat

Endothermic reactions are those which absorbs heat from the surrounding. ie

Reactant + heat - - - - > product

- Gas burning in a car is exothermic as it releases heat into the surrounding which cause warm up of car engines.

-Condensation ie vapour turns into liquid. In this process  water vapor molecules come into contact with cooler molecules., so it is  a exothermic process.

- evaporating isopropyl alcohol from skinis a endothermic process as it requires heat to turn isopropyl alcohol into vapour .