Determine ΔH_solute for KBr if the ΔH_solution(KBr)= +19.9 kJ/mol and the ΔH_hydration(KBr)= -670.kJ/mol. A) +650 kJ/mol B) -650 kJ/mol C) +690 kJ/mol D) -710 kJ/mol E) -690 kJ/mol

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Quizplus · Accepted Answer

ΔH_solution = ΔH_solute + ΔH_hydration. Rearranging gives ΔH_solute = ΔH_solution - ΔH_hydration = 19.9 kJ/mol - (-670 kJ/mol) = 19.9 kJ/mol + 670 kJ/mol = 689.9 kJ/mol, which rounds to +690 kJ/mol.

Determine ΔHsolute for KBr If the ΔHsolution (KBr)= +19

Determine ΔH_solute for KBr If the ΔH_solution(KBr)= +19