1. Q = 112.8 kJ
2. Q = 5.01 kJ
<h3>Further explanation</h3>The heat to change the phase can be formulated :
Q = mLf (melting/freezing)
Q = mLv (vaporization/condensation)
Lf=latent heat of fusion
Lv=latent heat of vaporization
1. m=50 g=0.05 kg
Lv for water = 2256 kJ/kg
2. m=15 g=0.015 kg
Lf for water = 334 kj/kg
Answer: n= 4, , l= 3, = 1, permissible
Explanation:
Principle Quantum Numbers : It describes the size of the orbital and the energy level. It is represented by n. Where, n = 1,2,3,4....
Azimuthal Quantum Number : It describes the shape of the orbital. It is represented as 'l'. The value of l ranges from 0 to (n-1).For l = 0,1,2,3... the orbitals are s, p, d, f...
Magnetic Quantum Number : It describes the orientation of the orbitals. It is represented as . The value of this quantum number ranges from
Spin Quantum number : It describes the direction of electron spin. This is represented as . The value of this is
for upward spin and
for downward spin.
a) n=1 , l= 2, = 0, not permissible as l can not greater than n.
b) n= 4, , l= 3, = 1, permissible
c) n= 3, l= 3, = 1, not permissible as l can not equal than n.
d) n= 4 , l= 3, = 4, not permissible as
can not greater than l.