This diagram represents chlorine monofluoride
the arrow shows that the bond between the chlorine atom and the fluorine atom is
, and the chlorine atom is
. the electrons in the bond are pulled

a corroding iron, if that's one of your choices

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.

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