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10699149Hi I need help on question 9. When I tried it I got it wrong

so please help me and thank you. All good explanations are welcome

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Quiz: HW 13
An Ideal Gaseous Reaction Occurs At A Constant Pre... |..
Math
D
Question 8
0.2 pts
A common laboratory reaction is the neutralization of an acid with a base. When 41.0 mL of 0.500
M HCI at 25.0C is added to 56.8 ml of 0.500 M NaOH at 25.0C in a coffee cup calorimeter (with a
negligible heat capacity), the temperature of the mixture rises to 28.2C. What is the heat of
reaction per mole of NaCl (in kJ/mol)? Assume the mixture has a specific heat capacity of 4.18
J/(g.K) and that the densities of the reactant solutions are both 1.07 g/mL.
Enter your answer to three significant figures in units of kJ/mol.
D
Question 9
0.2 pts
A student wishes to determine the heat capacity of a coffee-cup calorimeter. After she mixes
109.2 g of water at 63.3.C with 109.2 g of water, already in the calorimeter, at 21.8.C, the final
temperature of the water is 35.0C. Calculate the heat capacity of the calorimeter in J/K. Use
4.184 J/g C as the specific heat of water.
Enter your answer to three significant figures in unit of J/K.
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