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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?

Respuesta :

igeclement43

Answer:

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

The mass of the environment where the temperature is being calculated in the experiment would be:

- 263.9g

Given that,

Mass of solute(solid NaOH) = 13.9g

Mass of solvent(Water) = 250g

Reaction:

NaOH(s) → Na+(aq) + OH-(aq)

To find,

The mass of the environment where the temperature is being calculated in the experiment = ?

So,

The total mass of solution = Mass of solute + Mass of solvent

[tex]= 13.9g + 250g[/tex]

[tex]= 263.9g[/tex]

Since the mass of the surrounding is equivalent to the mass of the calorimeter, the mass of the environment at which the temperature is measured = 263.9g

Thus, the mass of the environment where the temperature is being calculated in the experiment would be [tex]263.9g[/tex].

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