A copper block ( ) is cooled from to by placing it in a large water bath that stays at

CHEMISTRY · Single correct · A Level · Chemistry · Energetics · Energetics

Problem

0.20\,\text{kg}

copper block (

c = 0.39\,\text{kJ kg}^{-1}\,\text{K}^{-1}

) is cooled from

150\,^{\circ}\text{C}

25\,^{\circ}\text{C}

by placing it in a large water bath that stays at

25\,^{\circ}\text{C}

. Calculate the approximate change in entropy of the universe. (a)

-5.3\,\text{J K}^{-1}

(b)

+9.6\,\text{J K}^{-1}

(c)

+5.3\,\text{J K}^{-1}

(d)

+32.7\,\text{J K}^{-1}