Question

2Na (s) + 2H₂O (1) → 2NaOH (aq) + H₂ (g) AH = -367.5 kJ Calculate mass of Na(s) produced during an enthalpy change +100 kJ ​

Answer 1

The mass of Na(s) produced during an enthalpy change +100 kJ ​is -469.55Kj/mol.

What is enthalpy?

Enthalpy is the sum of internal energy of the system and the volume and pressure.

For given reaction, ΔH°= 2(ΔHf)NaOH -2(a14)1 - 120

Substituting all value given

-367.5kj =2(ΔH°f) NaOH- 2x-285.8Kj/mol

(ΔH°f)NaOH=-939.1/2 = -469.55Kj/mol

Thus, the mass of Na(s) produced during an enthalpy change +100 kJ ​is -469.55Kj/mol.

Learn more about enthalpy

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