Answer:
Pros of wind energy Cons of wind energy
Renewable & clean source of energy Intermittent
Low operating costs Noise and visual pollution
Efficient use of land space Some adverse environmental impact
Explanation:
Answer:
D
Explanation:
A reaction becomes spontaneous when the value of the change in free energy is negative.
The relationship between the enthalpy, the entropy and the free energy in a chemical reaction is given below:
G = H – TS
Now, let’s input the values that we have.
One important thing to note is that we have to convert the KJ to Joules and this mean we have to multiply by a conversion factor of 1000. This mean 33KJ is 33,000J
33,000 = 92,200 - 198.7T
33,000 - 92,200 = -198.7T
-59,200 = - 198.7T
T = 59,200/198.7
T = 298k
Answer:
3,4,5,6,7,8
Explanation:
Groups 13 - 18 are the main group on the periodic table
The group number corresponds the number of valence electrons they contains.
Valence electrons are the number of electrons in the outermost shell of an atom.
So group 13 - 18 corresponds to a valency of 3,4,5,6,7,8.
Groups with a valency of 8 are the noble gases.
Answer: SMALLEST is lithium
LARGEST is Fluorine
Explanation: