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Ionic Enthalpy of Formation

APCHEM-BQSU8N

What is the standard enthalpy of formation for 0.50 mol aluminum sulfite?

$$Al_{(s)} + H_2O_{(g)} + SO_{2(g)} → Al_2(SO_3)_{3(s)} + H_{2(g)}$$

Note that:

  • $ΔH_f^o$= -242 kJ/mol for water vapor
  • $ΔH_f^o$= -297 kJ/mol for sulfur dioxide gas.
  • The enthalpy of the reaction is -1823 kJ/mol.
A

-3440 kJ

B

-1720 kJ

C

206 kJ

D

-1147 kJ