A 350.0 gram sample of an unknown substance is heated by 256.2 calories of energy and changes temperature from 26.5 degrees celsius to 28.9 degrees celsius. What is the specific heat of this unknown in calories per gram degree celsius?​

answer carbon and three oxygen atoms;

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.