(a) In a chemical reaction 2 moles of solid decompose to form one mole of gas. W
ID: 486696 • Letter: #
Question
(a) In a chemical reaction 2 moles of solid decompose to form one mole of gas. Would you expect AS to be positive, negative, or close to zero for this reaction? AS for this reaction should Select (b) In which of the processes described below should the entropy increase? Choose all of the correct possibilities, ce cubes melting at -5 OC and 1 atm pressure the dissolution of HCl(g) in water to form hydrochloric acid a balloon heated with a flame bursts releasing its contents formation solid rust (iron(III) oxide) by oxygen in the air reacting with the iron in an old boat the reaction of sodium metal with chlorine gas to form solid sodium chlorideExplanation / Answer
a. entropy is positive for the process because solid absorb heat to convert into gas(i.e. dH= positive. dG= dH-TdS, and to occur this process, dS must be significantly positive which could be able to overcome +dH value and so overall dG becomes negative wchich is neseccary for spontaneity of a reaction).
b. 1st and 3rd only.
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