Theirs eight steps In Scientific investigation
A is false Hydrogen bonds have nothing to do with boiling point
(a) The work done by the nitrogen against external pressure is 126.66 J.
(b) The change in the internal energy of the system is -2,466.66 J.
The given parameters:
- <em>Mass of the compound, = 2.25 g</em>
- <em>External pressure, P = 1.0 atm = 101325 Pa</em>
- <em>Density of Nitrogen gas, ρ = 1.165 g/L</em>
- <em>Temperature of the Nitrogen gas, T = 20⁰C</em>
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The molar mass of the given compound is calculated as follows;
NaN₃ = 23+ (14 x 3) = 65 g/mol
65 g -------------- 42
2.25 g ------------- ?

The volume of the nitrogen gas is calculated as follows;


The work done by the nitrogen against external pressure is calculated as follows;

The change in the internal energy of the system is calculated by applying first law of thermodynamics as follows;

Learn more about first law of thermodynamics here: brainly.com/question/2965070