Lithium has the highest specific heat of any pure metal. The temperature of a 25.00 g sample of lithium will increase by 7.69 K when 684.4 J of...

The specific heat is the amount of heat required to raise the temperature of a gram of a substance by 1 degree Celsius (or Kelvin). The heat energy required to raise the temperature of a substance is given as:

heat energy = mass of substance x specific heat of the substance x change in temperature

Here, mass of substance = 25 g

change in temperature = 7.69 K

heat energy needed = 684.4 J

Substituting these values in the equation, we get:

684.4 J = 25 g x specific heat of lithium x 7.69 K

or specific heat of Lithium = 684.4 J / (25 g x 7.69 K) = 3.56 J/g/K

We can also specify the specific heat of lithium as 3560 J/kg/K.

In comparison, the specific heat of water is 4.186 J/g/K or 4186 J/kg/K.

Hope this helps.