Physics

Problem

A small metal block initially at

400\,\text{K}

is dropped into a large reservoir of water at

300\,\text{K}

and allowed to reach thermal equilibrium at

300\,\text{K}

. Which option correctly states the sign of the total entropy change of the universe for this process? a)

\Delta S_{\text{univ}}=0

\Delta S_{\text{univ}}<0

\Delta S_{\text{univ}}>0

d) The sign of

\Delta S_{\text{univ}}

cannot be determined without knowing the masses.