Consider two different solutions of the same UV-absorbing compound. Upon UV-analysis, Solution B gave an absorbance of 1.0 and S
1 answer:
We have that the Concentration of solution B is 2.5 times more than solution A's concentration.
<h3>UV(Ultra violent) rays</h3>Question Parameters:
Upon UV-analysis, Solution B gave an absorbance of 1.0
Solution A gave an absorbance of 0. 4
Generally the equation for the Absorbance is mathematically given as
A = e*c*L
Therefore
For A solution
For B solution
Hence
[cB] = 2.5 [cA]
Therefore
Concentration of solution B is 2.5 times more than solution A's concentration.
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This is an incomplete question, here is a complete question.
For the gaseous reaction of carbon monoxide and chlorine to form phosgene (COCl₂)
Perform the following calculations:
A) Calculate ΔS at 298 K (ΔH= -220 kJ/mol and ΔG= -206 kJ/mol
B) Assuming that ΔS and ΔH change little with temperature, calculate ΔG at 450 K.
Answer :
(a) The value of ΔS at 298 K is, -0.0469 kJ/mol.K
(b) The value of ΔG at 450 K is, -199 kJ/mol
Explanation :
(a) According to Gibb's equation:
= Gibbs free energy = -206 kJ/mol
= enthalpy change = -220 kJ/mol
= entropy change = ?
T = temperature in Kelvin = 298 K
Now put all the given values in the above formula, we get:
Thus, the value of ΔS at 298 K is, -0.0469 kJ/mol.K
(b) According to Gibb's equation:
= Gibbs free energy = ?
= enthalpy change = -220 kJ/mol
= entropy change = -0.0469 kJ/mol.K
T = temperature in Kelvin = 450 K
Now put all the given values in the above formula, we get:
Thus, the value of ΔG at 450 K is, -199 kJ/mol