Answer: Option (a) is the correct answer.
Explanation:
Entropy means the degree of randomness present within the molecules of an object.
When a substance is present in a solid state then its molecules are held together because of strong intermolecular forces of attraction.
As a result, molecules are not able to move freely and therefore, there will be no randomness.
But when a substance changes into liquid state then its molecules mover further apart from each other due to gain in kinetic energy. Hence, randomness increases.
On the other hand, when a substance moves from liquid to gaseous state then its molecules gain more kinetic energy due to which there will be high degree of randomness.
Therefore, as the products in the given reaction are present in liquid and gaseous state. So, this means that there has been an increase in entropy.
A decrease in entropy is represented by negative sign and an increase in entropy is represented by a positive sign.
Thus, we can conclude that the sign of 
for the given reaction is > 0.
<u>Answer:</u> The concentration of 
in the solution is 
<u>Explanation:</u>
The given cell is:
Half reactions for the given cell follows:
<u>Oxidation half reaction:</u> 
( × 3)
<u>Reduction half reaction:</u> 
( × 2)
<u>Net reaction:</u> 
Substance getting oxidized always act as anode and the one getting reduced always act as cathode.
To calculate the 
of the reaction, we use the equation:
Putting values in above equation, we get:
To calculate the concentration of ion for given EMF of the cell, we use the Nernst equation, which is:
![E_{cell}=E^o_{cell}-\frac{0.059}{n}\log \frac{[H^{+}]^6}{[Au^{3+}]^2}](https://tex.z-dn.net/?f=E_%7Bcell%7D%3DE%5Eo_%7Bcell%7D-%5Cfrac%7B0.059%7D%7Bn%7D%5Clog%20%5Cfrac%7B%5BH%5E%7B%2B%7D%5D%5E6%7D%7B%5BAu%5E%7B3%2B%7D%5D%5E2%7D)
where,
= electrode potential of the cell = 1.23 V
= standard electrode potential of the cell = +1.50 V
n = number of electrons exchanged = 6
![[Au^{3+}]=?M](https://tex.z-dn.net/?f=%5BAu%5E%7B3%2B%7D%5D%3D%3FM)
![[H^{+}]=1.0M](https://tex.z-dn.net/?f=%5BH%5E%7B%2B%7D%5D%3D1.0M)
Putting values in above equation, we get:
![1.23=1.50-\frac{0.059}{6}\times \log(\frac{(1.0)^6}{[Au^{3+}]^2})](https://tex.z-dn.net/?f=1.23%3D1.50-%5Cfrac%7B0.059%7D%7B6%7D%5Ctimes%20%5Clog%28%5Cfrac%7B%281.0%29%5E6%7D%7B%5BAu%5E%7B3%2B%7D%5D%5E2%7D%29)
![[Au^{3+}]=1.87\times 10^{-14}M](https://tex.z-dn.net/?f=%5BAu%5E%7B3%2B%7D%5D%3D1.87%5Ctimes%2010%5E%7B-14%7DM)
Hence, the concentration of in the solution is
Answer:
the electricity dissipated, because of the time.
Explanation:
electricity dissipates.
Answer:
Work is a force causing the movement or displacement of an object
law of conservation mass:
1. Atoms cannot be created or destroyed in a chemical reaction.
2. Molecules cannot be created or destroyed in a chemical reaction.
3. Compounds cannot be created or destroyed in a chemical reaction.
4. Heat cannot be created or destroyed in a chemical reaction.
The simple equation used to calculate work is force multiplied by distance, thus as this is the case increasing the distance by a certain amount, assuming the force applied to the object is constant, the amount of work you are doing on the box for instance pushing it, is going to be greater
Since you are pushing the box with the same force covering a greater distance with the force.
