Answer: A) The reaction is spontaneous above 276 K.
Explanation:
According to Gibb's equation:
= Gibbs free energy
= enthalpy change = +29.3 kJ/mol =29300 J/mol
= entropy change = +106 J/molK
T = temperature in Kelvin
= +ve, reaction is non spontaneous
= -ve, reaction is spontaneous
= 0, reaction is in equilibrium
for reaction to be spontaneous
Thus the Reaction is spontaneous when temperature is above 276 K.
Answer:
A) Oxidized
B) Reduced
C) Oxidized
D) Oxidized
Explanation:
A) Cu becomes Cu²⁺
oxidation state increased from 0 to +2. It gets oxidize.
B) Sn⁺⁴ becomes Sn²⁺
oxidation state decreased from +4 to +2. It gets reduced.
C) Cr³⁺ becomes Cr⁺⁶
oxidation state increased from +3 to +6. It gets oxidize.
D) Ag becomes Ag⁺
oxidation state increased from 0 to +1. It gets oxidize.
Oxidation:
Oxidation involve the removal of electrons and oxidation state of atom of an element is increased.
Reduction:
Reduction involve the gain of electron and oxidation number is decreased.
<em>Consider the following reactions.
</em>
4KI + 2CuCl₂ → 2CuI + I₂ + 4KCl
the oxidation state of copper is changed from +2 to +1 so copper get reduced.
CO + H₂O → CO₂ + H₂
the oxidation state of carbon is +2 on reactant side and on product side it becomes +4 so carbon get oxidized.
Explanation:
If we compare its solubility products without any calculation then, Magnesium hydroxide is more soluble than compound A and C. Magnesium hydroxide is less soluble than compound D.
- The solubility product of magnesium hydroxide and zinc carbonate is same so it is not possible to determine whether it is more or less soluble than compound B
Answer:
demRafi is working odd jobs to save enough money to buy a new phone. Last month, he earned $125 raking leaves for his neighbors. This month, there was a big snowstorm. Rafi earned $235 shoveling snow!
How much money did Rafi earn altogether?Rafi is working odd jobs to save enough money to buy a new phone. Last month, he earned $125 raking leaves for his neighbors. This month, there was a big snowstorm. Rafi earned $235 shoveling snow!
How much money did Rafi earn altogether?Rafi is working odd jobs to save enough money to buy a new phone. Last month, he earned $125 raking leaves for his neighbors. This month, there was a big snowstorm. Rafi earned $235 shoveling snow!
How much money did Rafi earn altogether?
Explanation:lm
