Write a balanced chemical equation based on the following description: the reaction of solid iron(III) sulfide with aqueous hydrochloric acid to form aqueous iron(III) chloride and hydrogen sulfide gas.

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a lot

the answer your looking for is c).

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.