# Problem: When a 6.50-g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee-cup calorimeter (the following Figure), the temperature rises from 21.6 oC to 37.8 oC.Calculate ΔH (in kJ/mol NaOH) for the solution processNaOH(s) → Na+(aq) + OH-(aq)Assume that the specific heat of the solution is the same as that of pure water.

###### FREE Expert Solution

We are asked to calculate ΔH (in kJ/mol NaOH) for the solution process.

Calculate heat:

Q = 6.78 kJ

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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 following Figure), the temperature rises from 21.6 oC to 37.8 oC.

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.