• Exothermic reactions
▪ lose energy, releases heat, temperature of the surroundings increases
▪ involves bond formation (for phase change: gas → liquid → solid)
▪ ΔH is negative
• Endothermic reactions
▪ gain/requires energy, absorbs heat, temperature of the surroundings decreases
▪ involves breaking bonds (for phase change: solid → liquid → gas)
▪ ΔH is positive
Analyzing process given:
How should the baking of a pizza be categorized?
a. as an exothermic process because the dough releases heat
b. as an endothermic process because the dough releases heat
c. as an exothermic process because the dough absorbs heat
d. as an endothermic process because the dough absorbs heat
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