Question: Using the infromation below please only answer part C. I do not need p

Question

Question:

Using the infromation below please only answer part C. I do not need part A, it is only shown for your information.

In Part A. we saw that delta C = -242.1 kJ for the hydrogenation of acetylene under standard conditions (all pressures equal to 1 atm and the common reference temperature 298 K). In Part B. you will determine the delta G for the reaction under a given set of nonstandard conditions. Part B At 25 degree C the reaction from Part A has a composition as shown in the table below. What is the free energy change for the reaction under these conditions? Express your answer numerically in kilojoules. Acetylene C2H2, can be converted to ethane, C2H6. by a process known as hydrogenation. The reaction is Given the following data at standard conditions (all pressures equal to 1 atm and the common reference temperature 298 K), what is the value of Kp for this reaction? Express your answer using two significant figures The equilibrium constant of a system. K. can be related to the standard free energy change, delta G degree, using the following equation: where T is a specified temperature in kelvins (usually 298 K) and R is equal to 8.314 .J/(K. mol). Under conditions other than standard state, the following equation applies In this equation. Q lathe reaction quotient and is defined the same manner as K except that the concentrations or pressures used are not necessarily the equilibrium values.

Explanation / Answer

the reaction given is

C2H2 + 2H2 ----> C2H6

reaction quotient Q = pC2H6 / pC2H2 x (pH2)^2

using given values

Q= 4.25 x 10-2 / 4.85 x (4.25)^2

Q= 4.85 x 10-4

we know that

dG = dGo + RTlnQ

so

dG = ( -242.1 x 100) + ( 8.314 x 298 x ln 4.85 x 10-4 )

dG = -261 kJ

so the value of dG is -261 kJ

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