Best Answer:
The specific heat of a material tells you how much energy it will take to heat a certain mass of that material to a certain temp; alternately, it helps you figure out how much energy you would need to heat an amount of that material to increase its temp by a certain amount

In the case of metals, there is a very simple but useful relationship between the specific heat and its gram atomic weight. This relationship, first described by chemists DuLong and Petit in the early 1800s, shows that for metals, the product of its specfic heat x its gram atomic weight equals 6 cal/deg C. So, if you can measure the specific heat of a metal, you can use the Law of DuLong and Petit to estimate the atomic weight of the substance you have.

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