Four students all do the same experiment for the science fair. They test reaction times for pushing a button when a specific col
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Answer : The value of is, 11.2
The value of is -9.04 kJ/mol
Explanation :
The relation between the equilibrium constant and standard Gibbs free energy is:
where,
= standard Gibbs free energy = -5.980 kJ/mol = -5980 J/mol
R = gas constant = 8.314 J/K.mol
T = temperature =
= equilibrium constant = ?
Now put all the given values in the above formula, we get:
Thus, the value of is, 11.2
Now we have to calculate the .
The formula used for is:
The given reaction is:
............(1)
where,
= Gibbs free energy for the reaction = ?
= standard Gibbs free energy = -30.5 kJ/mol
R = gas constant =
T = temperature =
Q = reaction quotient
[A] = concentration of A = 1.8 M
[B] = concentration of B = 0.55 M
Now put all the given values in the above formula 1, we get:
Therefore, the value of is -9.04 kJ/mol
0.1045M is the concentration of the original sulfuric acid solution
Explanation:
Titration is done to know the volume or concentration of unknown electrolyte.
Data given:
volume of acid = 50 ml
molarity of acid =?
volume of base NaOH = 34.62 ml
molarity of the base = 0.1510
For titration the formula used is,
Macid x Vacid = Mbase x V base
Putting the values in above equation:
M acid x 50 = 34.62 x 0.1510
Macid =
= 0.1045 M is the molarity of sulphuric acid solution used in neutralization of 0.1510 M base solution.