When a solution of 1.691 g of silver nitrate is mixed with an excess of sodium chloride in a calorimeter of heat capacity 216 J.(^{$\omicron $}C)^-¹, the temperature rises 3.03^{$\omicron $}C.What is the reaction enthalpy? A) -65.7 kJ.mol^-¹ B) -0.654 kJ.mol^-¹ C) +111 kJ.mol^-¹ D) +65.7 kJ.mol^-¹ E) +0.654 kJ.mol^-¹

Question

Quizplus · Accepted Answer

The heat absorbed by the calorimeter is calculated using q = C * ΔT = 216 J/°C * 3.03°C = 654.48 J. The moles of AgNO3 are 1.691 g / 169.87 g/mol = 0.00995 mol. The reaction enthalpy is q/n = -654.48 J / 0.00995 mol = -65.7 kJ/mol.

When a Solution of 1 ο\omicron ο C)-1, the Temperature Rises 3

When a Solution of 1 $\omicron$ C)^-¹, the Temperature Rises 3