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To Determine the Enthalpy of Neutralization of a Strong Acid(HCl) with a Strong Base (NaOH)
To Determine the Enthalpy of Neutralization of a Strong Acid(HCl) with a Strong Base (NaOH)
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1)
What is the neutralisation process of enthalpy changes between acid and base?
The alkalinity increases because the acid ions are entirely shared with the base.
Unbalancing each other due to the ions not being completely dissolved.
They balance each other due to the ions of acid and base being completely dissolved.
Increasing the acidity due to the ions of the base reacting with acid.
2)
When the acetic acid (CH₃COOH) is neutralized by NaOH with an enthalpy of -50.6 kJ/mol⁻¹ and the neutralization reaction of the strong acid and the base is -55.9 kJ/mol⁻¹. What is the ionization of acetic acid (CH₃COOH)?
ΔH =ΔH1 + ΔH2 = -50.6 kJ/mol⁻¹ + (-55.9 kJ/mol⁻¹) = -106 kJ/mol⁻¹
ΔH =ΔH2 - ΔH1 = -55.9 kJ/mol⁻¹– (-50.6 kJ/mol⁻¹) = - 5.3 kJ/mol⁻¹
ΔH =ΔH2 / ΔH1 = -55.9 kJ/mol⁻¹ / (-50.6 kJ/mol⁻¹) = 1.1113 kJ/mol⁻¹
ΔH =ΔH1 x ΔH2 = - 50.6 kJ/mol⁻¹ x (-55.9 kJ/mol⁻¹) = 2,828.54 kJ/mol⁻¹
3)
During the enthalpy change in a system, the heat is absorbed or released of what?
The generated heat is absorbed or released at a constant temperature.
The generated heat is released as steam and saved as water drops.
The generated heat is absorbed or released based on the solution's boiling temperature.
The generated heat is absorbed or released at a constant pressure.
4)
What is the result of the neutralization reaction of the strong acid and base?
The H⁺ ions and the OH⁻ ions are combined, yielding the result of H₂O(l)
The H⁺ and OH⁻ ions are entirely dissolved, yielding the result of NaCl.
The H⁺ ions are entirely dissolved, yielding the Cl⁻ and OH⁻ ions.
The OH⁻ ions are dissolved, yielding the Na⁺ ions.
5)
The neutralization reaction of aid and base is exothermic; what results from enthalpy change?
The result of enthalpy change is positive
The result of enthalpy change is neutral.
The result of enthalpy change is negative
The result of enthalpy change is either completely acidic or alkali
6)
If the neutralization reaction of aid and base is endothermic, what results from enthalpy change?
The result of enthalpy change is positive
The result of enthalpy change is neutral.
The result of enthalpy change is either completely acidic or alkali
The result of enthalpy change is negative
7)
What happens when a strong acid of H₂SO₄ is mixed with a strong base of NaOH?
The temperature decreases due to the base taking the acid's heat.
The temperature increases due to the acid dissolving entirely with the base.
The temperature decreases when the acid takes over the heat generated during the reaction.
The temperature remains constant due to the acid and base balancing each other.
8)
During the practical session, a few drops of HCl are accidentally split on Sivakumar's right hand. The teacher instructed Sarath to do an initial precautionary procedure before heading to the hospital. Could you please pick which of the following initial precautionary procedure Sarath performed?
Sarath immediately washed Sivakumar’s hand with cold water and applied the paste of Na₂CO₃ to avoid burning deep in the skin.
Sarath immediately rinsed Sivakumar’s hand in the saline and Na₂CO₃ paste mixture to avoid burning deep in the skin.
Sarath immediately washed Sivakumar’s hand with warm water and again washed it with saline solution to avoid burning deep in the skin.
Sarath immediately washed Sivakumar’s hand with hot water and applied the paste of Na₂CO₃ to avoid burning deep in the skin.
9)
A strong acid (HNO₃) and base (NaOH) enthalpy neutralization is 57 kJ/mol⁻¹. What is the heat released when 0.5 moles of HNO₃ solution is added to 0.20 moles of NaOH solution?
23.5 kJ/mol⁻¹
5.8 kJ/mol⁻¹
34.7 kJ/mol⁻¹
11.4 kJ/mol⁻¹
10)
What is the neutralization reaction of mixing H₂SO₄ with NaHCO₃?
The H₂SO₄ is dissolved in NaHCO₃, giving out the result of NaOH and H₂O(l)
The NaHCO₃ combined and dissolved in the H₂SO₄, yielding the result of H₂O(l)
The NaHCO₃ reacts with H⁺ ions present in the H₂SO₄, yielding the result of the same Na₂CO₃ and H₂O(l)
The H₂SO₄ reacts with H⁺ ions present in the NaHCO₃ to increase the concentration of acidity.
11)
Which of the following neutralization reaction is involved in producing Aspirin for medicinal use and why?
The purest form of aspirin is mixed with H₂SO₄ to yield the combined product of aspirin because the pure form of aspirin might lead to skin allergies.
The purest form of aspirin is neutralized with NaOH to yield the combined product of aspirin because the pure form of aspirin may cause stomach irritation.
The purest form of aspirin is combined with HNO₃ to yield the combined product of aspirin because the purest form of aspirin can sometimes cause allergies and stomach irritation.
The purest form of aspirin is neutralized with HCl to yield the combined product of aspirin because the pure form of aspirin can sometimes cause skin burns.