Which household item uses radiation in a beneficial way?
a. conventional ovens
b. smoke detectors
c. electric air filters
d. computers and tv sets

answer; i do believe the correct answer is (river); /// good luck

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.