Based on the following observations decide the order of reactivity for hydrogen, magnesium, and copper. Hydrochloric acid reacts
1 answer:
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Answer:
The correct answer is option E.
Explanation:
The Gibbs free energy is given by expression:
ΔG = ΔH - TΔS
ΔH = Enthalpy change of the reaction
T = Temperature of the reaction
ΔS = Entropy change
We have :
ΔH = -720.5 kJ/mol = -720500 J/mol (1 kJ = 1000 J)
ΔS = -263.7 J/K
T = 141.0°C = 414.15 K
The Gibb's free energy of the given reaction at 141.0°C is -611.3 kJ/mol.
83.3 mL
Explanation:
M = 3M
V = 50mL
M = 1.80M
Unknown:
V = ?
Solution:
To solve this problem we must understand that the initial and final number of moles remains the same.
Number of moles = molarity x volume
Molarity x volume of initial solution = Molarity x volume of final solution
Therefore:
M x V
= M
x V
M is the molarity
V is the volume
i = initial state
f = final state
input the parameters;
3 x 50 = 1.8 x V
V = 83.3 mL
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