What is the direction of induced current and status on magnitude of the flux of the coil? (the current direction is observed from the right) a. direction of current: clockwise magnitude of flux: increasing b. direction of current: clockwise magnitude of flux: decreasing c. direction of current: counterclockwise magnitude of flux: increasing d. direction of current: counterclockwise magnitude of flux: decreasing

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

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.