Answer: [tex]CO_2(s)\rightarrow CO_2(g)[/tex]
Explanation:
Entropy is the measure of randomness or disorder of a system. If a system moves from an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.
is positive when randomness increases and is negative when randomness decreases.
a) 
2 molesof gas are converting to 2 moles of another gas , thus is zero.
b) 
1 mole of solid is converting to 1 mole of liquid, the randomness increases and thus is positive.
b) 
2 moles of ions are converting to 1 mole of solid, the randomness decreases and thus is negative
d) 
1 mole of solid is converting to 1 mole of gas, the randomness increases drastically and thus is highly positive.
Answer:
4104 Coulombs
Explanation:
charge = time(sec) *current
25*60 =1500+20=1520
2.7A * 1520 sec =4104
4104 C
Answer:
It's explained below.
Explanation:
An everyday situation is when we raise an object.
Now, when we raise an object, energy is transferred to the Earth object system and thus the gravitational field energy of the system will increase.
Now, this energy is usually released when the object falls. The mechanism of this release is known as gravitational force.
In the same manner, two magnetic and electrically charged objects that are interacting at a distance will exert forces on each other and this can lead to transfer of energy between the interacting objects.
