Soda drinks bubble when the bottle is opened because:
1 answer:
Answer:
(3) the partial pressure of carbon dioxide above the solution is reduced.
Explanation:
We know , Soda water contains pressured carbon dioxide pressured with cap because we know according to Henry's law partial pressure of the gas is directly proportional to pressure applied. Therefore, is pressurized in the bottle.
But as we open the bottle the pressure decreases the excess (and air) escapes producing effervescence and partial pressure of
decreases. ( Because of Henry's Law)
Hence, it is the required solution.
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Answer : The half-life at this temperature is, 3.28 s
Explanation :
To calculate the half-life for second order the expression will be:
When,
= half-life = ?
= initial concentration = 0.45 M
k = rate constant =
Now put all the given values in the above formula, we get:
Therefore, the half-life at this temperature is, 3.28 s
Answer:
Here's what I get.
Explanation:
The frequency of a vibration depends on the strength of the bond (the force constant).
The stronger the bond, the more energy is needed for the vibration, so the frequency (f) and the wavenumber increase.
Acetophenone
Resonance interactions with the aromatic ring give the C=O bond in acetophenone a mix of single- and double-bond character, and the bond frequency = 1685 cm⁻¹.
p-Aminoacetophenone
The +R effect of the amino group increases the single-bond character of the C=O bond. The bond lengthens, so it becomes weaker.
The vibrational energy decreases, so wavenumber decreases to 1652 cm⁻¹.
p-Nitroacetophenone
The nitro group puts a partial positive charge on C-1. The -I effect withdraws electrons from the acetyl group.
As electron density moves toward C-1, the double bond character of the C=O group increases.
The bond length decreases, so the bond becomes stronger, and wavenumber increases to 1693 cm¹.
