How is enthalpy used to predict whether a reaction is endothermic or exothermic?
1 answer:
You might be interested in
Answer: Option D is correct.
Explanation: Equation given by de Broglie is:
where, = wavelength of the particle
h = Planck's constant
m = mass of the particle
v = velocity of the particle
In option A, football will have some mass and is moving with a velocity of 25 m/s, hence it will have some wavelength.
In Option B, unladen swallow also have some mass and is moving with a velocity of 38 km/hr, hence it will also have some wavelength.
In Option C, a person has some mass and is running with a velocity of 7 m/hr, hence it will also have some wavelength.
As, the momentum of these particles are large, therefore the wavelength will be of small magnitude and hence, is not observable.
From the above, it is clearly visible that all the options are having some wavelength, so option D is correct.
Answer: Option (e) is the correct answer.
Explanation:
Formula to calculate radius is as follows.
p(r) =
=
= 0
+
= 0
=
r =
Thus, we can conclude that most likely radius at which the electron would be found is .