Answer:
![T_b=-88.48\°C](https://tex.z-dn.net/?f=T_b%3D-88.48%5C%C2%B0C)
Explanation:
Hello,
In this case, since the entropy of vaporization is defined in terms of the enthalpy of vaporization and the boiling point of the given substance, nitrous oxide, as shown below:
![\Delta _{vap}S=\frac{\Delta _{vap}}{T_b}](https://tex.z-dn.net/?f=%5CDelta%20_%7Bvap%7DS%3D%5Cfrac%7B%5CDelta%20_%7Bvap%7D%7D%7BT_b%7D)
Solving for the boiling point of nitrous oxide, we obtain:
![T_b=\frac{\Delta _{vap}H}{\Delta _{vap}S}=\frac{16.53\frac{kJ}{mol}*\frac{1000J}{1kJ} }{89.51\frac{J}{mol} } \\ \\T_b=184.67K](https://tex.z-dn.net/?f=T_b%3D%5Cfrac%7B%5CDelta%20_%7Bvap%7DH%7D%7B%5CDelta%20_%7Bvap%7DS%7D%3D%5Cfrac%7B16.53%5Cfrac%7BkJ%7D%7Bmol%7D%2A%5Cfrac%7B1000J%7D%7B1kJ%7D%20%7D%7B89.51%5Cfrac%7BJ%7D%7Bmol%7D%20%7D%20%5C%5C%20%5C%5CT_b%3D184.67K)
Which in degree Celsius is also:
![Tb=184.67-273.15\\\\T_b=-88.48\°C](https://tex.z-dn.net/?f=Tb%3D184.67-273.15%5C%5C%5C%5CT_b%3D-88.48%5C%C2%B0C)
Best regards.
Answer:C2H6N
Explanation:
Putrescine formula is C4H12N2
Assuming 100g sample is present
The percent changes to grams and it is converted to moles by dividing it with the atomic masses.
C= 54.50g/12 = 4.541moles
H = 13.73g/1 = 13.73moles
N= 31.77g/14 = 2.269moles
Divide through with the smallest moles value.
C= 4.541/2.269 = 2
H= 13.73/2.269=6
N= 2.269/2.269=1
Therefore the empirical formula is
C2H6N
To find joules (heat) we use the following formula
heat= mass x specific heat x ΔT
mass= 72.5 grams
specific heat (Water)= 4.184 j/g·C
ΔT= 95 - 28= 67 °C
heat= (72.5 grams) (4.18 j/g·C) (67°C)= 20300 joules or 20.3 Kilojoules
Rayleigh waves (which are a type of surface wave) produce the largest amplitude and so most severe ground movements during earthquakes.
Surface waves produce the most severe ground movements. They produce movements similar to waves in the water, where the water's particles move in a pattern that is almost circular. They move more slowly then P waves or S waves.