Answer:
W = 54.48J
Explanation:
Gases do expansion or compression work following the equation:
W = −PΔV
Where P = Pressure
ΔV = Change in Volume
Parameters given in the question:
Pressure = 1atm
Temperature = 22°C + 273 = 295K (Converting to Kelvin Temperature)
Mass of NaN₃ = 23.3g
2NaN₃ --> 2Na + 3N2
From the equation;
2 mol of NaN₃ produces 3 mol of N2 gas
130g (2 * 65g/mol) of NaN₃ produces 3 L ( 3mol * 1mol/L) of N2
23.3 produces x?
130 = 3
23.3 = x
Upon solving for x:
x = (23.3 * 3) / 130
x = 0.5377L
ΔV = Final Volume - Initial Volume
ΔV = 0.5377L - 0
ΔV = 0.5377L
W = −PΔV = - 1 * 0.5377
W = - 0.5377L atm
Note: When the gas does work the volume of a gas increases ΔV>0 and the work done is negative.
1 L atm = 101.325 J.
W = 0.5377L atm * (101.325 J / 1 L atm)
W = 54.48J
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Answer:
it's A but I don't know the other one
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