50.0mL was used for each compound in reactions ex) (50ml of NaOH + 50ml of HCl)

Question

50.0mL was used for each compound in reactions

ex) (50ml of NaOH + 50ml of HCl)

5. Data and Results 1) In the space provided below write the balanced net ionic reaction equations for each described reaction. Use the table of thermodynamic data in your textbook (or another approved resource) to calculate the molar enthalpy of the reactions. (Neatly show how you obtained your result) Reaction 1: Reaction between 2.000 M HCI and 2.00 M NaoH aqueous solutions Reaction 2: Reaction between 2.00 M NaoH and 2.00 M NH4CI aqueous solutions Reaction 3: Reaction between 2.00 M HCI and 2.00 M NH3 NH40H) aqueous solutions balanced net ionic reaction equations AH (kJ/mol) Reaction

Explanation / Answer

Experiment A)

balanced net-ionic equation

H+ + OH- --> H2O

q = mCpdT = 100 x 4.18 x 12.8 = 5.3504 kJ

dH = -6.3504/2 M x 0.05 L = -53.504 kJ/mol

Experiment B)

balanced net-ionic equation

NH4+ + OH- --> NH4OH

q = mCpdT = 100 x 4.18 x 1.3 = 0.543 kJ

dH = -0.543/2 M x 0.05 L = -5.434 kJ/mol

Experiment A)

balanced net-ionic equation

H+ + NH3 --> NH4+

q = mCpdT = 100 x 4.18 x 8.5 = 35.53 kJ

dH = -35.53/2 M x 0.05 L = -355.30 kJ/mol

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