The reaction of 5.5 grams or HCl with excess NaOH releases 8300 J or heat. What

Question

The reaction of 5.5 grams or HCl with excess NaOH releases 8300 J or heat. What it the molar hoot of neutralization, kJ/mol, for this reaction? Enter your answer with no units. Make sure to indicate the Sign (positive or negative). A laboratory worker is studying the combustion of hydrazine (N_2H_4) using a bomb calorimeter with a heat capacity of 50 degree C. Combustion of 5.00 g of hydrazine causes a rise in temperature of 2.6 degree c. what is the H_rxn for the combustion of hydrazine in kilojoules per mole? Enter your answer with no units. Make sure to indicate the sign (positive or negative).

Explanation / Answer

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16.

heat of neutralisation is heat released.
So sign will be negative
Number of moles of HCl reacted = mass/ molar mass
                                                                   = 5.5/36.5
                                                                   = 0.151 mol
Heat of neutralisation = -8300 J / 0.151 mol
                                                = - 54996.9 J/mol
                                                = -54.97 KJ/mol
Answer: -54.97 KJ/mol

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