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The equilibrium concentrations of the species in the reaction A + B ⇔ C + D are 2, 3, 10 and 6 mol L-1, respectively at 300 K. ΔG0 for the reaction is (R = 2cal/mol K)
  • a)
    -137.26 cal
  • b)
    -1381.80 cal
  • c)
    -13.73 cal
  • d)
    1372.60 cal
Correct answer is option 'B'. Can you explain this answer?
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Calculating ΔG0 for the Reaction

Given:
- Equilibrium concentrations: [A] = 2 mol L-1, [B] = 3 mol L-1, [C] = 10 mol L-1, [D] = 6 mol L-1
- Reaction: A + B ⇌ C + D
- ΔG0 = -RTlnK

Calculating the Reaction Quotient Q

Q = [C]^c[D]^d / [A]^a[B]^b
Q = (10^1) (6^1) / (2^1) (3^1)
Q = 60 / 6
Q = 10

Calculating ΔG

- Using the equilibrium concentrations to calculate ΔG:
ΔG = ΔG0 + RTlnQ
ΔG = -RTlnK + RTlnQ
ΔG = RTln(Q/K)

Substitute the values:
ΔG = (2 cal/mol K) * 300 K * ln(10/1)

Final Calculation

ΔG = 1381.80 cal

Therefore, the correct answer is option 'B', -1381.80 cal.
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Read the passage given below and answer the following questions:The rate of a reaction, which may also be called its velocity or speed, can be defined with relation to the concentration of any of the reacting substances, or to that of any product of the reaction. If the species chosen is a reactant which has a concentration c at time t the rate is - dc/dt, while the rate with reference to a product having a concentration x at time t is dx/dt. Any concentration units may be used for expressing the rate; thus, if moles per liter are employed for concentration and seconds for the time, the units for the rate are moles litre–1sec–1. For gas reactions pressure units are sometimes used in place of concentrations, so that legitimate units for the rate would be (mm. Hg) sec–1 and atm. sec–1 The order of a reaction concerns the dependence of the rate upon the concentrations of reacting substances; thus, if the rate is found experimentally to be proportional to the ath power of the concentration of one of the reactants A, to the both power of the concentration of a second reactant B, and so forth, via., rate = k CAα CAβ the over-all order of the reaction is simply n = α + β + ----- (2) Such a reaction is said to be of the αth order with respect to the substance A, the βth order with respect to B.In the following questions, a statement of Assertion followed by a statement of Reason is given. Choose the correct answer out of the following choices on the basis of the above passage.Assertion: The unit of k is independent of order of reaction.Reason: The unit of k is moles L–1s–1.

Read the passage given below and answer the following questions:The rate of a reaction, which may also be called its velocity or speed, can be defined with relation to the concentration of any of the reacting substances, or to that of any product of the reaction. If the species chosen is a reactant which has a concentration c at time t the rate is - dc/dt, while the rate with reference to a product having a concentration x at time t is dx/dt. Any concentration units may be used for expressing the rate; thus, if moles per liter are employed for concentration and seconds for the time, the units for the rate are moles litre–1sec–1. For gas reactions pressure units are sometimes used in place of concentrations, so that legitimate units for the rate would be (mm. Hg) sec–1 and atm. sec–1 The order of a reaction concerns the dependence of the rate upon the concentrations of reacting substances; thus, if the rate is found experimentally to be proportional to the ath power of the concentration of one of the reactants A, to the both power of the concentration of a second reactant B, and so forth, via., rate = k CAα CAβ the over-all order of the reaction is simply n = α + β + ----- (2) Such a reaction is said to be of the αth order with respect to the substance A, the βth order with respect to B.In the following questions, a statement of Assertion followed by a statement of Reason is given. Choose the correct answer out of the following choices on the basis of the above passage.Assertion: Rate of reaction is a measure of change in concentration of reactant with respect to time.Reason: Rate of reaction is a measure of change in concentration of product with respect to time.

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The equilibrium concentrations of the species in the reaction A + B ⇔ C + D are 2, 3, 10 and 6 mol L-1,respectively at 300 K. ΔG0 for the reaction is (R = 2cal/mol K)a)-137.26 calb)-1381.80 calc)-13.73 cald)1372.60 calCorrect answer is option 'B'. Can you explain this answer?
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