The reaction A--->B + H_3O^+ is characterized byΔ r G ⊖ =12 kJ/molandΔ r H ⊖ =21 kJ/molat300 K. (a) What is the reaction entropyΔ r S ⊖ (5 pts) (b) What isΔ r G ⊕ atT=300 K(5 pts)?
Question
The reaction A--->B + H_3O^+ is characterized byΔ r G ⊖ =12 kJ/molandΔ r H ⊖ =21 kJ/molat300 K. (a) What is the reaction entropyΔ r S ⊖ (5 pts) (b) What isΔ r G ⊕ atT=300 K(5 pts)?
Solution
(a) To find the reaction entropy ΔrS⊖, we can use the formula ΔrH⊖ = TΔrS⊖, where T is the temperature in Kelvin. Rearranging the formula gives us ΔrS⊖ = ΔrH⊖ / T.
Substituting the given values into the formula, we get:
ΔrS⊖ = (21 kJ/mol) / (300 K) = 0.07 kJ/mol·K
(b) To find ΔrG⊕ at T=300 K, we can use the formula ΔrG⊖ = ΔrH⊖ - TΔrS⊖.
Substituting the given values into the formula, we get:
ΔrG⊕ = (12 kJ/mol) - (300 K * 0.07 kJ/mol·K) = 12 kJ/mol - 21 kJ/mol = -9 kJ/mol
So, the reaction entropy ΔrS⊖ is 0.07 kJ/mol·K and ΔrG⊕ at T=300 K is -9 kJ/mol.
Similar Questions
Standard entropy of X2, Y2 and XY3 are 60, 40 and 50 JK–1 mol–1, respectively. For the reaction,X2 + Y2 → XY3, ΔH = – 30 kJ, to be at equilibrium, the temperature will be1250 K500 K750 K1000 K
Consider the following reaction at 298 K.32O2( g)⇌O3( g)⋅KP=2.47×10−29.ΔrG⊕ for the reaction is _______ kJ. (Given R =8.314JK−1 mol−1)
Which of the following reactions would have a decrease in entropy?A.2NH3(g) N2(g) + 3H2(g)B.2SO3(g) 2SO2(g) + O2(g)C.2H2O(g) 2H2(g) + O2(g)D.2NO2(g) N2O4(g)SUBMITarrow_backPREVIOUS
Calculate the standard entropy change for the reaction:C8 H 18 (l) + 25 ⁄2 O 2 (g) ® 8 CO 2 (g) + 9 H 2 O (g)given the following information:Substance S° [J mol-1 K -1 )]C8 H 18 329.3O 2 205.2CO 2 213.8H 2 O 70.0
What happens to the entropy in the reaction I2(s) I2(g)?A.It is impossible to tell.B.Entropy increases in the reaction.C.Entropy stays the same in the reaction.D.Entropy decreases in the reaction.SUBMITarrow_backPREVIOUS
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.