Problem: When a 6.50-g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee-cup calorimeter, the temperature rises from 21.6°C to 37.8°C. Calculate ΔH (in kJ/mol NaOH) for the solution process NaOH(s) → Na+ (aq) + OH- (aq) Assume that the specific heat of the solution is the same as that of pure water. Express your answer with the appropriate units.

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Problem Details

When a 6.50-g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee-cup calorimeter, the temperature rises from 21.6°C to 37.8°C. 

Calculate ΔH (in kJ/mol NaOH) for the solution process 

NaOH(s) → Na(aq) + OH- (aq) 

Assume that the specific heat of the solution is the same as that of pure water. Express your answer with the appropriate units.


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