The heat from Uyen's breathe causes heer to see her breathe visibly. The state that is responsible for it though is Vaporization and Condensation.
I hope this helps! (^_^)
Answer:
The speed of the raindrop is 11.55 m/s.
Explanation:
We need to find the speed of the rain in the "y" direction. We have:
: speed of the raindrop at 60° (vertical) =?
: speed of the car = 20 m/s (in the "x" direction)
Hence, the speed of the car and the speed of the raindrop are related by:
Therefore, the speed of the raindrop is 11.55 m/s.
I hope it helps you!
Answer:
The bond energy of F–F = 429 kJ/mol
Explanation:
Given:
The bond energy of H–H = 432 kJ/mol
The bond energy of H–F = 565 kJ/mol
The bond energy of F–F = ?
Given that the standard enthalpy of the reaction:
<u>H₂ (g) + F₂ (g) ⇒ 2HF (g)</u>
ΔH = –269 kJ/mol
So,
<u>ΔH = Bond energy of reactants - Bond energy of products.</u>
<u>–269 kJ/mol = [1. (H–H) + 1. (F–F)] - [2. (H–F)]</u>
Applying the values as:
–269 kJ/mol = [1. (432 kJ/mol) + 1. (F–F)] - [2. (565 kJ/mol)]
Solving for , The bond energy of F–F , we get:
<u>The bond energy of F–F = 429 kJ/mol</u>
Answer:
it will be 1/9 of its orignal amount why
ok i dontknow why or how but that
No, interatomic bonds aren't broken during boiling.
Yes, intermolecular forces are overcome when water boils.
<h3><u>Explanation:</u></h3>
Boiling of water is a physical change of state that converts the liquid water into water vapour. This process takes place in 100°C.
In liquid water, there are different forces of attraction between the molecules of water, most importantly the van der Waal's force, and the hydrogen bonds. van der Waal's forces are very weak, so of negligible importance. But hydrogen bonding are of significant strength. They are present between the hydrogen atoms and the oxygen atoms of different molecules of water. During boiling, these forces are weakened by the increasing kinetic energy of molecules and the water molecules start to boil off as water vapour. There's no breaking of interatomic bonds, which would have produced hydrogen and oxygen gases instead of water vapour.