Answer:
ΔG = 98.67 kJ/mol
Explanation:
Let' s consider the following reaction.
Hg₂Cl₂(s) → Hg₂²⁺(aq) + 2Cl⁻(aq)
The standard Gibbs free energy (ΔG°) for the reaction is:
ΔG° = 1 mol × ΔG°f(Hg₂²⁺(aq)) + 2 mol × ΔG°f(Cl⁻(aq)) - 1 mol × ΔG°f(Hg₂Cl₂(s))
where,
ΔG°f: standard Gibbs free energy of formation
ΔG° = 1 mol × (154.72 kJ/mol) + 2 mol × (-134.08 kJ/mol) - 1 mol × (-215.06 kJ/mol)
ΔG° = 101.62 kJ
This is standard Gibbs free energy change per mole of reaction.
The Gibbs free energy of the reaction (ΔG) can be calculated using the following expression.
ΔG = ΔG° - R.T.lnQ
where,
R: ideal gas constant
T: absolute temperature
Q: reaction quotient
ΔG = ΔG° - R.T.ln([Hg₂²⁺].[Cl⁻]²)
ΔG = 101.62 kJ/mol + (8.314 × 10⁻³ kJ/mol.K) . (298.2 K) . ln [(0.926).(0.573)²]
ΔG = 98.67 kJ/mol
Visible and Ultraviolet Spectroscopy
Violet: 400 - 420 nm.
Indigo: 420 - 440 nm.
Blue: 440 - 490 nm.
Green: 490 - 570 nm.
Yellow: 570 - 585 nm.
Orange: 585 - 620 nm.
Red: 620 - 780 nm.
Hope this helps
Answer:
there is no question to answer :(
2Na + 2H₂O ⇒ 2NaOH + H₂
n(Na):n(NaOH)=2:2, n(NaOH)=n(Na)=3mol
m(NaOH)=n·M= 3mol · 40g/mol(molar mass, 23+16+1)=120g.
I believe the correct answer from the choices listed above is option 2. From the balanced equation, the energy is absorbed as the bonds are broken. Energy is needed to be supplied for the bonds to be broken.
Hope this answers the question. Have a nice day.
