An experiment is carried out where 13.9 g of solid NaOH is dissolved in 250.0 g of water in a coffee-cup calorimeter. Dissolution is not a chemical reaction, but is a chemical process: NaOH (s) → Na + (aq) + OH - (aq) The mixture can be assumed to have the same specific heat capacity as liquid water (4.18 J g-1 ºC-1). What is the mass of the surroundings where the temperature is being measured in the experiment?

Question

Bryce

Chemistry

12 May, 09:00

An experiment is carried out where 13.9 g of solid NaOH is dissolved in 250.0 g of water in a coffee-cup calorimeter. Dissolution is not a chemical reaction, but is a chemical process: NaOH (s) → Na + (aq) + OH - (aq) The mixture can be assumed to have the same specific heat capacity as liquid water (4.18 J g-1 ºC-1). What is the mass of the surroundings where the temperature is being measured in the experiment?

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Answers (1)

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Aarav Stanton · Answer 1

263.9g

Explanation

Total mass of solution = mass of solute + mass of solvent = 13.9+250g = 263.9g

Mass of surrounding = mass of calorimeter = 263.9g