A sample of cobalt, A, with a mass of 5g is initially at 25 degrees Celsius. When this sample gains 6.70J of heat, the temperature rises to 27.9 degrees Celsius. Another sample of cobalt B with a mass of 7 g is initially at 25 degrees Celsius. If sample B gains 5 J of heat, what is the final temp of B. I

Question

A sample of cobalt, A, with a mass of 5g is initially at 25 degrees Celsius. When this sample gains 6.70J of heat, the temperature rises to 27.9 degrees Celsius. Another sample of cobalt B with a mass of 7 g is initially at 25 degrees Celsius. If sample B gains 5 J of heat, what is the final temp of B. I 
Honestly don't know how to do this.

DrBob222 · Answer

A two-step problem. First, determine the specific heat of Co from sample A.
q = mass Co x specific heat Co x (Tfinal-Tinitial). The only unknown in this equation is specific heat Co in sample A.

Specific heat doesn't change. NHow use the same formula for sample B of Co.
q = mass Co x sp.h. Co x (Tfinal-Tinitial). The only unknown in this equation is Tfinal.