AnimeGurlBYah

12.03.2021 • 

Chemistry

A student prepares a cold pack by dissolving 35.0 g of NaNO3 (MM = 85.0 g/mol) in 95.5 g of water in a calorimeter and the temperature of the solution drops to 10.6 oC. Assume that the specific heat capacity of the solution (mostly water) = 4.18 J/g.°C and that ALL the heat from the dissolution gets transferred to the solution. a) Is this process occurring in an open, closed or isolated system?
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This is because (choose from I - V)
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I. the calorimeter is losing both matter and heat to the outside of the calorimeter.
II. the calorimeter loses heat to the outside air but does not lose any of the NaNO 3 .
III. some of the NaNO 3 is lost outside but the heat transfer occurs inside the calorimter.
IV. transfer of matter and heat occur within the calorimeter and not to the outside.
IV. transfer of matter and heat occur oustide the calorimeter and not on the isnide.

Ответ:

kadenreynolds5

24.01.2023

Chemistry

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2NaN3(s)→2Na(s)+3N2(g)

Explanation:

In balancing a chemical reaction, the rule of thumb is that the number of atoms of each element on the reactant side must equal the number of atoms of the same element on the product side.

Let us see if the rule was obeyed above:

There are six nitrogen atoms on both the left and right hand sides of the reaction equation

There are two sodium atoms on the right and left hand sides of the reaction equation.

Hence, the reaction equation is balanced.

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