How much heat is needed to be supplied to a 3.5 kg cylindrical rod if its volume changes by 1/4 of its original size? Assume that it is initially at 20K and that c = 2 cal/g.C and α = 8x10^2/C

Answer 1

Heat to do what? expand it a certain length? heat it to a certain temperature?

If you are just looking at heat content for a specific temperature change, heat is directly proportional to mass, which is directly related to volume.

heat then equals 1/4 of the original.

But I suspect you are looking at something else.

Answer 2

the problem stated that the rod has expanded 1/4 its volume. I am looking for the heat supplied that has made its volume expand. please help :D