A block of copper and a block of gold are brought into contact, and heat is transferred between them until equilibrium is reached. The copper block is 250 g and its initial temperature is 450 K; the Cp (by mass) of copper is 0.39 JK-. The gold block is 100 g and its initial temperature is 300 K; the Cp (by mass) of gold is 0.129 J K'g'. You may assume that the heat capacities of each metal remain constant with the given temperature ranges, and no heat is transferred into the surrounding atmosphere (that is, all heat is transferred between the blocks). The pressure remains at 1.0 atm through the whole process. a. Is this process reversible or irreversible and why? b. No mass is transferred, yet we treat the system as open. Why? c. Calculate: Tfinal, AHsys, Assys, Assurr, Astot , and AGsys, where the system consists of both blocks together. Note that the 2nd Law states that both blocks should be the same temperature at the end of the process (equilibrium). If any of these can be considered zero, provide a brief (