Change Of Phases In Exothermic Reactions And Self-Sustaining Exothermic Reactions

Question

1. Which of the following changes of phase is exothermic?

a) Gas to Liquid                                 

b) Solid to Liquid                              

c) Solid to Gas

d) Liquid to Gas

2. Exothermic reactions are usually self-sustaining because

a) Exothermic reactions usually require low activation energies

b) Exothermic reactions usually require high activation energies

c) The energy released is sufficient to maintain the reaction

d) The products contain more potential energy than the reactants

Summary

These questions belong to Chemical Engineering and they discusses about exothermic changes of phase and self-sustaining exothermic reactions.

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