a) Gas to Liquid
b) Solid to Liquid
c) Solid to Gas
d) Liquid to Gas
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
These questions belong to Chemical Engineering and they discusses about exothermic changes of phase and self-sustaining exothermic reactions.
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