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To Determine the Enthalpy of Neutralization of a Strong Acid(HCl) with a Sturdy Base (NaOH)
To Determine the Enthalpy of Neutralization of a Strong Acid(HCl) with a Sturdy Base (NaOH)
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1)
Acetic acid is neutralized by NaOH with an enthalpy of -50.6 kJ mol1. Determine ΔH for the ionization of CH3COOH. Given that the heat of neutralization for a strong acid with a strong base is -55.9 kJ mol1?
ΔHΔH = −5.3kJmol−1−5.3kJmol−1
ΔHΔH = +5.3kJmol−1+5.3kJmol−1
ΔHΔH = −10.6kJmol−1−10.6kJmol−1
None of these
2)
The heat of neutralization of a strong base and a strong acid is 57 Kj. The released when 0.5 mole of HNO₃ solution is added to 0.20 moles of NaOH solution, is
11.4 kJ
-34.7 kJ
23.5 kJ
-58.8 kJ
3)
Change in enthalpy of the system is the heat absorbed at a
Constant volume
Constant temperature
Constant pressure
None of these
4)
The change of enthalpy in an exothermic reaction is
Negative
Constant
Any of these
Positive
5)
The change of enthalpy in an endothermic reaction is
Constant
Any of these
Negative
Positive
6)
The value of the heat of neutralization depends on
The basicity of the acid
The strength of the alkali
All of these
The strength of the acid
7)
In a plastic cup with a lid, 50 cm3 of 1.0 mol dm-3 sulfuric acid and 50 cm3 of 2.0 mol dm-3 potassium hydroxide solution are added to each other at 28.5°C to estimate the heat of Neutralization. The mixture is then stirred, and a temperature of 41.5°C is the highest recorded. Calculate the Neutralization heat. [Specific heat capacity of solution: 4.2 J g-1 °C-1; density of solution: 1 g cm-3]
32.6kj of heat
50.5kj of heat
54kj of heat
54.6kj of heat
8)
The enthalpy of a substance (denoted by h), is defined as
h = -u-pv
h = u-pv
h = u+pv
h = -u+pv
9)
What happens when a solution of an acid is mixed with a solution of a base in a test tube?
Temperature of the solution increase
None of these
Temperature of the solution decreases
Temperature of the solution remain as same
10)
What should be done if a student's hand accidentally gets a few drops of strong acid on it?
Wash the hand immediately with plenty of water and apply a paste of NaHCO3
Wash the hand with saline solution
After washing with plenty of water and apply solution of sodium hydroxide on the hand
Neutralize the acid with a strong alkali