is the ΔS°rxn for the formation of Cu₂O(s) from its elements.
WHAT IS ΔS°rxn FOR THE REACTION ?
The direction of spontaneous change is the direction in which total entropy increases. Total entropy change, also called the entropy change of the universe, is the sum of the entropy change of a system and of its surroundings
Standard entropy change of below reaction (ΔS°
)
∴ ΔH° = - 168.6 KJ/mol
Now, 
![= S^o_{Cu_2 O(s)} - [2 * S^o_{Cu(s)} + \frac{1}{2}(S^o_{O_2(g)}]](https://tex.z-dn.net/?f=%3D%20S%5Eo_%7BCu_2%20O%28s%29%7D%20-%20%5B2%20%2A%20S%5Eo_%7BCu%28s%29%7D%20%2B%20%5Cfrac%7B1%7D%7B2%7D%28S%5Eo_%7BO_2%28g%29%7D%5D)
![= (93.1 J/molK)- [2 * 133.1 + \frac{1}{2}(205.0)]J/molK](https://tex.z-dn.net/?f=%3D%20%2893.1%20J%2FmolK%29-%20%5B2%20%2A%20133.1%20%2B%20%5Cfrac%7B1%7D%7B2%7D%28205.0%29%5DJ%2FmolK)
Thus, -75.6 J/mol K is the ΔS°rxn for the formation.
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<span>Which part of the electromagnetic spectrum has a higher frequency than ultraviolet light? </span>B. Gamma Rays.
Answer:
Faraday's constant will be smaller than it is supposed to be.
Explanation:
If the copper anode was not completely dry when its mass was measured, mass of the copper must be heavier than it should have been. Hence, the calculated Faraday’s constant would be smaller than it is supposed to be since when calculating Faraday’s Constant, the charge transferred is divided by the moles of electrons.
The molarity of the solution made by dissolving 0.05 mole of HCl in 2 L of H₂O is 0.025 M
<h3>What is molarity? </h3>
Molarity is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:
Molarity = mole / Volume
<h3>How to determine the molarity </h3>
- Mole of HCl = 0.05 mole
- Volume = 2 L
- Molarity =?
Molarity = mole / Volume
Molarity = 0.05 / 2
Molarity = 0.025 M
Thus, the molarity of the solution is 0.025 M
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