Entropy and Second Law of Thermodynamics Practice Test

Two identical copper blocks, one at $350,\text{K}$ and the other at $300,\text{K}$, are placed in contact and isolated from the environment. They reach $325,\text{K}$; the process is spontaneous. Which statement best accounts for the sign of the total entropy change?

A proposed device operates in a cycle, absorbing $500,\text{J}$ from a single $400,\text{K}$ reservoir and producing $500,\text{J}$ of work each cycle (claimed spontaneous). Which conclusion is consistent with the second law?