The chemical bond in fuel are changed when the fuel is burned to move a car. What type of energy conversion is taking place in this example? A. Kinetic energy to mechanical energy.
B. Chemical energy to potential energy.
C. Potential energy to kinetic energy.
D. Mechanical energy to electrical energy.

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.