14.7 g of solid sodium hydrogen carbonate ( = 84.008 g mol) was reacted with 120 mL of 1.50 mol L hydrochloric acid solution (density 1.02 g mL) in a calorimeter. The temperature of the solution before and after reaction was recorded.
 

Assume that all produced is lost from the reaction solution and that the specific heat capacity of the reaction solution is 3.80 J K g.

What is the enthalpy of reaction, in kJ mol?   (5 marks)

100.00 mL of 2.00 mol L¯¹ was initially at a temperature of 22.5°C. The mass of this solution was 103 g.

10.0 g of solid was added to the acid. The specific heat capacity of the resulting solution was 3.99 J g ¯¹ K ¯¹.

Assuming no energy loss to the environment, calculate the maximum temperature reached by the solution.   (5 marks)

Use the following information in your calculations.

Students conducted an experiment to determine for the reaction between sodium hydroxide and hydrochloric acid.

The data from one student are shown in the table below.
 

Assume that all the solutions have the same specific heat capacity as water.

1. Calculate the heat energy released in this experiment.   (2 marks)

2. A second student using the same procedure obtained for the heat energy released in their experiment.
3. Use this value to determine the enthalpy of neutralisation, , in , for the reaction shown.
4.         (2 marks)