Solve the all parts of given problem:
Problem: A 30.6 g block of copper whose temperature is 435 K is placed in an insulating box with a 125 g block of lead whose temperature is 127 K.
Part A: What is the equilibrium temperature of the two-block system?
Part B: What is the change in the internal energy of the two-block system between the initial state and the equilibrium state?
Part C: What is the change in the entropy of the two-block system? The heat capacities of copper and lead are 386 J/kg•K and 128 J/kg•K, respectively.
I need help to find the equilibrium temperature of the two-block system.