A sample of an unknown alloy is heated to and then quickly transferred into a…

CHEMISTRY · Subjective · A Level · Chemistry · Energetics · Energetics

Problem

25.0\,\text{g}

sample of an unknown alloy is heated to

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

and then quickly transferred into a calorimeter that contains

60.0\,\text{g}

of water and

40.0\,\text{g}

of ethanol (specific heat capacity

2.44\,\text{J}\,\text{g}^{-1}\,^{\circ}\text{C}^{-1}

), both initially at

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

. The calorimeter has a heat capacity of

12.0\,\text{J}\,^{\circ}\text{C}^{-1}

. The final equilibrium temperature is

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

. Determine the specific heat capacity of the alloy in

\text{J}\,\text{g}^{-1}\,^{\circ}\text{C}^{-1}