When they were full of air, then the Pressure was the Highest 'cause of the larger force under the specified area as compared to when we released it.
We decreased the area of our cheek, so pressure increased and air flows from the cheek (area of high pressure) to the atmosphere (Area of the Lower pressure).
Air flows from Cheek to the Outside of your mouth i.e., in open air.
Hope this helps!
I believe bar C would be Mercury and bar B would be jupiter. I'm not to sure on this it could be wrong, it would help if i could see the graph but anyway i hope this helps you. :)
Answer:
a) +640 kJ/mol or +1.06x10⁻¹⁸ J
b) +276 kJ/mol
Explanation:
To dissociate the molecule, the bond must be broken, thus, it's necessary energy equal to the energy of the bond, which can be calculated by:
E = (Q1*Q2)/(4*π*ε*r)
Where Q is the charge of the ions, ε is a constant (8.854x10⁻¹²C²J ⁻¹ m⁻¹), and r is the bond length. Each one of the ions has a charge equal to 1. The elementary charge is 1.602x10⁻¹⁹C, which will be the charge of them.
1 mol has 6.022x10²³ molecules (Avogadros' number), so the energy of 1 mol is the energy of 1 molecule multiplied by it:
E = 6.022x10²³ *(1.602x10⁻¹⁹)²/(4π*8.854x10⁻¹²*2.17x10⁻¹⁰)
E = +640113 J/mol
E = +640 kJ/mol
Or at 1 molecule: E =640/6.022x10²³ = +1.06x10⁻²¹ kJ = +1.06x10⁻¹⁸ J
b) The energy variation to dissociate the molecule at its neutral atoms is the energy of dissociation less the difference of the ionization energy of K and the electron affinity of F (EA):
498 = 640 - (418 - EA)
640 -418 + EA = 498
222 + EA = 498
EA = +276 kJ/mol
Answer:
c
Explanation:
it is from crest to crest
Answer:
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Explanation:
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