How much energy is required to raise the temperature of 0.2 kg of aluminum
from 15°c to 18°c? (refer to table of specific heat values.)

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.