Two identical neutralization reactions are carried out in separate calorimeters that…

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

Problem

Two identical neutralization reactions are carried out in separate calorimeters that differ only in their calorimeter constants:

C_{\text{cal,A}} = 20\,\text{J}\,^\circ\!\text{C}^{-1}

and

C_{\text{cal,B}} = 80\,\text{J}\,^\circ\!\text{C}^{-1}

. All other experimental conditions (masses, concentrations, and heat released) are the same. Which statement correctly compares the temperature changes

\Delta T_A

and

\Delta T_B

observed during the experiments? (a)

\Delta T_A < \Delta T_B

because calorimeter A absorbs more heat than calorimeter B. (b)

\Delta T_A = \Delta T_B

because both reactions release the same quantity of heat. (c)

\Delta T_A > \Delta T_B

because less heat is required to raise the temperature of calorimeter A. (d)

\Delta T_B = 4\,\Delta T_A

because calorimeter B\,'s heat capacity is four times that of calorimeter A.

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